/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 03:02:40,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 03:02:40,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 03:02:40,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-10 03:02:40,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-10 03:02:40,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-10 03:02:40,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-10 03:02:40,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-10 03:02:40,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-10 03:02:40,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-10 03:02:40,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-10 03:02:40,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-10 03:02:40,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-10 03:02:40,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-10 03:02:40,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-10 03:02:40,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-10 03:02:40,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-10 03:02:40,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-10 03:02:40,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-10 03:02:40,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-10 03:02:40,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-10 03:02:40,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-10 03:02:40,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-10 03:02:40,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-10 03:02:40,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-10 03:02:40,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-10 03:02:40,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-10 03:02:40,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-10 03:02:40,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-10 03:02:40,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-10 03:02:40,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-10 03:02:40,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-10 03:02:40,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-10 03:02:40,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-10 03:02:40,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-10 03:02:40,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-10 03:02:40,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-10 03:02:40,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-10 03:02:40,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-10 03:02:40,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-10 03:02:40,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-10 03:02:40,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-MCRwithDepranks-BasicCegarLoop.epf [2022-02-10 03:02:40,676 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 03:02:40,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 03:02:40,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 03:02:40,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 03:02:40,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 03:02:40,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 03:02:40,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 03:02:40,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 03:02:40,678 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 03:02:40,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 03:02:40,678 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 03:02:40,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 03:02:40,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 03:02:40,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 03:02:40,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 03:02:40,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 03:02:40,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 03:02:40,679 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 03:02:40,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 03:02:40,679 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 03:02:40,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 03:02:40,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 03:02:40,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 03:02:40,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 03:02:40,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 03:02:40,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:02:40,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 03:02:40,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 03:02:40,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 03:02:40,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 03:02:40,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 03:02:40,681 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 03:02:40,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 03:02:40,681 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 03:02:40,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 03:02:40,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 03:02:40,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 03:02:40,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 03:02:40,909 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 03:02:40,912 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 03:02:40,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2022-02-10 03:02:40,913 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2022-02-10 03:02:40,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 03:02:40,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 03:02:40,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 03:02:40,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 03:02:40,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 03:02:40,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,960 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 03:02:40,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 03:02:40,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 03:02:40,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 03:02:40,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 03:02:40,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 03:02:40,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 03:02:40,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 03:02:40,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 03:02:40,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/1) ... [2022-02-10 03:02:40,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:02:40,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:41,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-10 03:02:41,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-10 03:02:41,036 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 03:02:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 03:02:41,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 03:02:41,036 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 03:02:41,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 03:02:41,036 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 03:02:41,036 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 03:02:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 03:02:41,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 03:02:41,037 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-10 03:02:41,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-10 03:02:41,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-10 03:02:41,038 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 03:02:41,075 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 03:02:41,076 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 03:02:41,168 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 03:02:41,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 03:02:41,210 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-10 03:02:41,212 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:02:41 BoogieIcfgContainer [2022-02-10 03:02:41,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 03:02:41,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 03:02:41,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 03:02:41,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 03:02:41,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:02:40" (1/2) ... [2022-02-10 03:02:41,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e6e425 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 03:02:41, skipping insertion in model container [2022-02-10 03:02:41,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:02:41" (2/2) ... [2022-02-10 03:02:41,222 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2022-02-10 03:02:41,225 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 03:02:41,226 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 03:02:41,226 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 03:02:41,226 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 03:02:41,274 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-10 03:02:41,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 03:02:41,341 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-10 03:02:41,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-10 03:02:41,348 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-02-10 03:02:41,375 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:42,198 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 35029 transitions and produced 12173 states. [2022-02-10 03:02:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 12173 states, 7958 states have (on average 1.9913294797687862) internal successors, (15847), 12172 states have internal predecessors, (15847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:02:42,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:42,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:42,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:42,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1991221056, now seen corresponding path program 1 times [2022-02-10 03:02:42,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:42,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071274879] [2022-02-10 03:02:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:42,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:42,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:42,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071274879] [2022-02-10 03:02:42,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071274879] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:02:42,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:02:42,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:02:42,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771294324] [2022-02-10 03:02:42,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:02:42,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:02:42,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:42,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:02:42,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:02:42,879 INFO L87 Difference]: Start difference. First operand has 12173 states, 7958 states have (on average 1.9913294797687862) internal successors, (15847), 12172 states have internal predecessors, (15847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:43,318 INFO L93 Difference]: Finished difference Result 11825 states and 15449 transitions. [2022-02-10 03:02:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:02:43,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-10 03:02:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:43,356 INFO L225 Difference]: With dead ends: 11825 [2022-02-10 03:02:43,356 INFO L226 Difference]: Without dead ends: 3679 [2022-02-10 03:02:43,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:02:43,363 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:43,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2022-02-10 03:02:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 63. [2022-02-10 03:02:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2022-02-10 03:02:43,448 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 17 [2022-02-10 03:02:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:43,448 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2022-02-10 03:02:43,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2022-02-10 03:02:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 03:02:43,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:43,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:43,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 03:02:43,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:43,456 INFO L85 PathProgramCache]: Analyzing trace with hash 888177262, now seen corresponding path program 2 times [2022-02-10 03:02:43,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:43,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377779581] [2022-02-10 03:02:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:43,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:02:43,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:43,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377779581] [2022-02-10 03:02:43,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377779581] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:02:43,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:02:43,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:02:43,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131302992] [2022-02-10 03:02:43,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:02:43,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:02:43,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:02:43,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:02:43,530 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:43,581 INFO L93 Difference]: Finished difference Result 87 states and 178 transitions. [2022-02-10 03:02:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:02:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-10 03:02:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:43,583 INFO L225 Difference]: With dead ends: 87 [2022-02-10 03:02:43,583 INFO L226 Difference]: Without dead ends: 81 [2022-02-10 03:02:43,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:02:43,585 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:43,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 13 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:02:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-10 03:02:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2022-02-10 03:02:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2022-02-10 03:02:43,605 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 17 [2022-02-10 03:02:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:43,605 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2022-02-10 03:02:43,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2022-02-10 03:02:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:02:43,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:43,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:43,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 03:02:43,608 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1909058573, now seen corresponding path program 1 times [2022-02-10 03:02:43,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:43,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587310530] [2022-02-10 03:02:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:43,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:43,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:43,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587310530] [2022-02-10 03:02:43,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587310530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:02:43,784 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:02:43,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-10 03:02:43,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069136083] [2022-02-10 03:02:43,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:02:43,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 03:02:43,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:43,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 03:02:43,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:02:43,792 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:43,876 INFO L93 Difference]: Finished difference Result 94 states and 175 transitions. [2022-02-10 03:02:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:02:43,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-10 03:02:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:43,877 INFO L225 Difference]: With dead ends: 94 [2022-02-10 03:02:43,877 INFO L226 Difference]: Without dead ends: 89 [2022-02-10 03:02:43,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:02:43,879 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:43,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-10 03:02:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2022-02-10 03:02:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 145 transitions. [2022-02-10 03:02:43,888 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 145 transitions. Word has length 18 [2022-02-10 03:02:43,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:43,888 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 145 transitions. [2022-02-10 03:02:43,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 145 transitions. [2022-02-10 03:02:43,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:02:43,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:43,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:43,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-10 03:02:43,889 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:43,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:43,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1801896379, now seen corresponding path program 2 times [2022-02-10 03:02:43,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:43,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961875213] [2022-02-10 03:02:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:43,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:44,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:44,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961875213] [2022-02-10 03:02:44,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961875213] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:02:44,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:02:44,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-10 03:02:44,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435147773] [2022-02-10 03:02:44,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:02:44,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 03:02:44,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 03:02:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:02:44,021 INFO L87 Difference]: Start difference. First operand 70 states and 145 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:44,126 INFO L93 Difference]: Finished difference Result 113 states and 209 transitions. [2022-02-10 03:02:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:02:44,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-10 03:02:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:44,127 INFO L225 Difference]: With dead ends: 113 [2022-02-10 03:02:44,127 INFO L226 Difference]: Without dead ends: 96 [2022-02-10 03:02:44,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-10 03:02:44,129 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:44,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 21 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-10 03:02:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2022-02-10 03:02:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 153 transitions. [2022-02-10 03:02:44,136 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 153 transitions. Word has length 18 [2022-02-10 03:02:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:44,137 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 153 transitions. [2022-02-10 03:02:44,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 153 transitions. [2022-02-10 03:02:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-10 03:02:44,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:44,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:44,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-10 03:02:44,138 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:44,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:44,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1182241473, now seen corresponding path program 1 times [2022-02-10 03:02:44,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:44,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105521293] [2022-02-10 03:02:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:44,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:44,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:44,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105521293] [2022-02-10 03:02:44,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105521293] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:02:44,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:02:44,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:02:44,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705077419] [2022-02-10 03:02:44,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:02:44,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:02:44,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:44,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:02:44,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:02:44,192 INFO L87 Difference]: Start difference. First operand 74 states and 153 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:44,248 INFO L93 Difference]: Finished difference Result 80 states and 163 transitions. [2022-02-10 03:02:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:02:44,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-10 03:02:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:44,250 INFO L225 Difference]: With dead ends: 80 [2022-02-10 03:02:44,250 INFO L226 Difference]: Without dead ends: 76 [2022-02-10 03:02:44,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:02:44,251 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:44,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 25 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:02:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-10 03:02:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2022-02-10 03:02:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 140 transitions. [2022-02-10 03:02:44,254 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 140 transitions. Word has length 19 [2022-02-10 03:02:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:44,254 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 140 transitions. [2022-02-10 03:02:44,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 140 transitions. [2022-02-10 03:02:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-10 03:02:44,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:44,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:44,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-10 03:02:44,256 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1302690239, now seen corresponding path program 1 times [2022-02-10 03:02:44,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:44,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066144051] [2022-02-10 03:02:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:44,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:44,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:44,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066144051] [2022-02-10 03:02:44,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066144051] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:02:44,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:02:44,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:02:44,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520584125] [2022-02-10 03:02:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:02:44,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:02:44,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:02:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:02:44,316 INFO L87 Difference]: Start difference. First operand 69 states and 140 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:44,375 INFO L93 Difference]: Finished difference Result 97 states and 187 transitions. [2022-02-10 03:02:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:02:44,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-10 03:02:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:44,377 INFO L225 Difference]: With dead ends: 97 [2022-02-10 03:02:44,377 INFO L226 Difference]: Without dead ends: 97 [2022-02-10 03:02:44,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:02:44,378 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:44,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 27 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:02:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-10 03:02:44,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2022-02-10 03:02:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2022-02-10 03:02:44,382 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 19 [2022-02-10 03:02:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:44,382 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2022-02-10 03:02:44,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2022-02-10 03:02:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-10 03:02:44,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:44,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:44,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-10 03:02:44,384 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash 955148747, now seen corresponding path program 2 times [2022-02-10 03:02:44,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:44,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845793713] [2022-02-10 03:02:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:44,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:44,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:44,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845793713] [2022-02-10 03:02:44,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845793713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:44,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041021178] [2022-02-10 03:02:44,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:44,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:44,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:44,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:02:44,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 03:02:44,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:44,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:44,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:02:44,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:44,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:44,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041021178] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:44,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-10 03:02:44,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2022-02-10 03:02:44,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408173810] [2022-02-10 03:02:44,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:02:44,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:02:44,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:02:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-10 03:02:44,702 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:44,773 INFO L93 Difference]: Finished difference Result 100 states and 207 transitions. [2022-02-10 03:02:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:02:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-10 03:02:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:44,774 INFO L225 Difference]: With dead ends: 100 [2022-02-10 03:02:44,774 INFO L226 Difference]: Without dead ends: 100 [2022-02-10 03:02:44,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-10 03:02:44,775 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:44,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 18 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-10 03:02:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2022-02-10 03:02:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2022-02-10 03:02:44,779 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 19 [2022-02-10 03:02:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:44,779 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2022-02-10 03:02:44,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2022-02-10 03:02:44,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-10 03:02:44,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:44,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:44,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:45,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:45,016 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:45,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:45,017 INFO L85 PathProgramCache]: Analyzing trace with hash 692202507, now seen corresponding path program 3 times [2022-02-10 03:02:45,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:45,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017650068] [2022-02-10 03:02:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:45,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:02:45,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:45,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017650068] [2022-02-10 03:02:45,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017650068] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:02:45,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:02:45,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 03:02:45,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156588430] [2022-02-10 03:02:45,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:02:45,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:02:45,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:02:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:02:45,064 INFO L87 Difference]: Start difference. First operand 83 states and 171 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:45,120 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2022-02-10 03:02:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:02:45,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-10 03:02:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:45,121 INFO L225 Difference]: With dead ends: 102 [2022-02-10 03:02:45,121 INFO L226 Difference]: Without dead ends: 102 [2022-02-10 03:02:45,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-10 03:02:45,122 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:45,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:02:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-10 03:02:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2022-02-10 03:02:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.012987012987013) internal successors, (155), 77 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 155 transitions. [2022-02-10 03:02:45,127 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 155 transitions. Word has length 19 [2022-02-10 03:02:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:45,127 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 155 transitions. [2022-02-10 03:02:45,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 155 transitions. [2022-02-10 03:02:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-10 03:02:45,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:45,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:45,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-10 03:02:45,129 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1087270225, now seen corresponding path program 1 times [2022-02-10 03:02:45,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:45,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871001040] [2022-02-10 03:02:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:45,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:02:45,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:45,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871001040] [2022-02-10 03:02:45,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871001040] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:45,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586244341] [2022-02-10 03:02:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:45,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:45,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:45,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:02:45,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 03:02:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:45,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 03:02:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:02:45,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:02:45,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586244341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:45,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:45,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-02-10 03:02:45,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207298442] [2022-02-10 03:02:45,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:45,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-10 03:02:45,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:45,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-10 03:02:45,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-10 03:02:45,585 INFO L87 Difference]: Start difference. First operand 78 states and 155 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:45,760 INFO L93 Difference]: Finished difference Result 268 states and 546 transitions. [2022-02-10 03:02:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-10 03:02:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-10 03:02:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:45,762 INFO L225 Difference]: With dead ends: 268 [2022-02-10 03:02:45,762 INFO L226 Difference]: Without dead ends: 175 [2022-02-10 03:02:45,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:02:45,763 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 106 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:45,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 36 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-10 03:02:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 144. [2022-02-10 03:02:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.132867132867133) internal successors, (305), 143 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 305 transitions. [2022-02-10 03:02:45,767 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 305 transitions. Word has length 20 [2022-02-10 03:02:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:45,767 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 305 transitions. [2022-02-10 03:02:45,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 305 transitions. [2022-02-10 03:02:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-10 03:02:45,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:45,768 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:45,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:45,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-10 03:02:45,994 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:45,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1711381252, now seen corresponding path program 2 times [2022-02-10 03:02:45,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:45,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332366352] [2022-02-10 03:02:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:45,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:02:46,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:46,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332366352] [2022-02-10 03:02:46,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332366352] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:46,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312300181] [2022-02-10 03:02:46,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:46,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:46,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:46,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:02:46,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 03:02:46,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:46,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-10 03:02:46,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:02:46,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:02:46,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312300181] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:46,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:46,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-02-10 03:02:46,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367660095] [2022-02-10 03:02:46,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:46,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 03:02:46,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 03:02:46,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-10 03:02:46,371 INFO L87 Difference]: Start difference. First operand 144 states and 305 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:46,531 INFO L93 Difference]: Finished difference Result 218 states and 458 transitions. [2022-02-10 03:02:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 03:02:46,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-10 03:02:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:46,532 INFO L225 Difference]: With dead ends: 218 [2022-02-10 03:02:46,532 INFO L226 Difference]: Without dead ends: 187 [2022-02-10 03:02:46,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:02:46,534 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 104 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:46,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 34 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:02:46,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-02-10 03:02:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 166. [2022-02-10 03:02:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1515151515151514) internal successors, (355), 165 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 355 transitions. [2022-02-10 03:02:46,539 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 355 transitions. Word has length 23 [2022-02-10 03:02:46,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:46,539 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 355 transitions. [2022-02-10 03:02:46,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:46,539 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 355 transitions. [2022-02-10 03:02:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:02:46,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:46,542 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:46,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:46,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:46,756 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -611296751, now seen corresponding path program 3 times [2022-02-10 03:02:46,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:46,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65209486] [2022-02-10 03:02:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:46,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:47,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:47,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65209486] [2022-02-10 03:02:47,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65209486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:47,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704324788] [2022-02-10 03:02:47,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:02:47,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:47,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:47,062 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:02:47,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 03:02:47,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:02:47,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:47,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:02:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:47,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:02:47,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:02:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:47,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:48,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:48,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:02:48,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:48,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:02:48,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:48,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:02:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:48,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704324788] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:48,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:48,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:02:48,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460384564] [2022-02-10 03:02:48,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:48,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:02:48,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:48,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:02:48,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:02:48,466 INFO L87 Difference]: Start difference. First operand 166 states and 355 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:48,770 INFO L93 Difference]: Finished difference Result 224 states and 469 transitions. [2022-02-10 03:02:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:02:48,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:02:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:48,772 INFO L225 Difference]: With dead ends: 224 [2022-02-10 03:02:48,772 INFO L226 Difference]: Without dead ends: 219 [2022-02-10 03:02:48,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:02:48,773 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:48,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 122 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:02:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-10 03:02:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 183. [2022-02-10 03:02:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2032967032967035) internal successors, (401), 182 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 401 transitions. [2022-02-10 03:02:48,779 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 401 transitions. Word has length 24 [2022-02-10 03:02:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:48,779 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 401 transitions. [2022-02-10 03:02:48,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 401 transitions. [2022-02-10 03:02:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:02:48,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:48,780 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:48,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-10 03:02:48,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:48,992 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:48,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:48,992 INFO L85 PathProgramCache]: Analyzing trace with hash -203390323, now seen corresponding path program 4 times [2022-02-10 03:02:48,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:48,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828056299] [2022-02-10 03:02:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:48,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:49,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:49,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828056299] [2022-02-10 03:02:49,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828056299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:49,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370450538] [2022-02-10 03:02:49,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:02:49,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:49,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:49,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:02:49,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 03:02:49,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:02:49,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:49,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:02:49,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:49,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:02:49,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:02:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:49,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:50,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:50,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-02-10 03:02:50,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:50,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-10 03:02:50,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:50,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-10 03:02:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:50,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370450538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:50,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:50,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-10 03:02:50,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225631123] [2022-02-10 03:02:50,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:50,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:02:50,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:50,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:02:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:02:50,433 INFO L87 Difference]: Start difference. First operand 183 states and 401 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:50,999 INFO L93 Difference]: Finished difference Result 275 states and 572 transitions. [2022-02-10 03:02:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:02:51,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:02:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:51,001 INFO L225 Difference]: With dead ends: 275 [2022-02-10 03:02:51,002 INFO L226 Difference]: Without dead ends: 251 [2022-02-10 03:02:51,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:02:51,002 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:51,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 163 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:02:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-10 03:02:51,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 203. [2022-02-10 03:02:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.207920792079208) internal successors, (446), 202 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 446 transitions. [2022-02-10 03:02:51,008 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 446 transitions. Word has length 24 [2022-02-10 03:02:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:51,008 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 446 transitions. [2022-02-10 03:02:51,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 446 transitions. [2022-02-10 03:02:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:02:51,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:51,009 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:51,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-10 03:02:51,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-10 03:02:51,226 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:51,227 INFO L85 PathProgramCache]: Analyzing trace with hash 515295697, now seen corresponding path program 5 times [2022-02-10 03:02:51,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:51,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793167915] [2022-02-10 03:02:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:51,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:51,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:51,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793167915] [2022-02-10 03:02:51,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793167915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:51,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980392832] [2022-02-10 03:02:51,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:02:51,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:51,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:02:51,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-10 03:02:51,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:02:51,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:02:51,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:51,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:02:51,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:51,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:02:51,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:51,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:02:52,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:52,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:53,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:53,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:02:53,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:53,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:02:53,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:53,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:02:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:53,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980392832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:53,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:53,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:02:53,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642417532] [2022-02-10 03:02:53,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:53,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:02:53,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:02:53,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:02:53,363 INFO L87 Difference]: Start difference. First operand 203 states and 446 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:53,663 INFO L93 Difference]: Finished difference Result 278 states and 599 transitions. [2022-02-10 03:02:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:02:53,664 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:02:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:53,665 INFO L225 Difference]: With dead ends: 278 [2022-02-10 03:02:53,666 INFO L226 Difference]: Without dead ends: 273 [2022-02-10 03:02:53,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:02:53,666 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:53,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 127 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 360 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-02-10 03:02:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-02-10 03:02:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 205. [2022-02-10 03:02:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2107843137254903) internal successors, (451), 204 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 451 transitions. [2022-02-10 03:02:53,672 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 451 transitions. Word has length 24 [2022-02-10 03:02:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:53,672 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 451 transitions. [2022-02-10 03:02:53,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 451 transitions. [2022-02-10 03:02:53,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:02:53,673 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:53,673 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:53,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:53,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:53,895 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:53,896 INFO L85 PathProgramCache]: Analyzing trace with hash 220033967, now seen corresponding path program 6 times [2022-02-10 03:02:53,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:53,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934410110] [2022-02-10 03:02:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:53,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:54,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:54,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934410110] [2022-02-10 03:02:54,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934410110] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:54,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980791331] [2022-02-10 03:02:54,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:02:54,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:54,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:54,220 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:02:54,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-10 03:02:54,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:02:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:02:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:54,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:02:54,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:54,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:02:54,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:54,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:02:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:54,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:55,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:55,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:02:55,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:55,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:02:55,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:55,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:02:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:55,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980791331] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:55,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:55,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:02:55,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609580648] [2022-02-10 03:02:55,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:55,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:02:55,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:02:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:02:55,846 INFO L87 Difference]: Start difference. First operand 205 states and 451 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:56,498 INFO L93 Difference]: Finished difference Result 288 states and 619 transitions. [2022-02-10 03:02:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:02:56,498 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:02:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:56,500 INFO L225 Difference]: With dead ends: 288 [2022-02-10 03:02:56,500 INFO L226 Difference]: Without dead ends: 283 [2022-02-10 03:02:56,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:02:56,501 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:56,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 177 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 599 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-02-10 03:02:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-10 03:02:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 206. [2022-02-10 03:02:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2195121951219514) internal successors, (455), 205 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 455 transitions. [2022-02-10 03:02:56,506 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 455 transitions. Word has length 24 [2022-02-10 03:02:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:56,506 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 455 transitions. [2022-02-10 03:02:56,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 455 transitions. [2022-02-10 03:02:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:02:56,507 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:56,507 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:56,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:56,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:56,723 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1207059789, now seen corresponding path program 7 times [2022-02-10 03:02:56,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:56,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498528158] [2022-02-10 03:02:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:56,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:56,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:56,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498528158] [2022-02-10 03:02:56,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498528158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:56,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833689158] [2022-02-10 03:02:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:02:56,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:56,979 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:02:56,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-10 03:02:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:57,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:02:57,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:57,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:57,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:02:57,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:57,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:02:57,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:57,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-10 03:02:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:57,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:02:58,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:58,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:02:58,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:58,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:02:58,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:02:58,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:02:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:58,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833689158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:02:58,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:02:58,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:02:58,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151701816] [2022-02-10 03:02:58,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:02:58,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:02:58,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:02:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:02:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:02:58,418 INFO L87 Difference]: Start difference. First operand 206 states and 455 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:02:58,548 INFO L93 Difference]: Finished difference Result 269 states and 576 transitions. [2022-02-10 03:02:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:02:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:02:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:02:58,550 INFO L225 Difference]: With dead ends: 269 [2022-02-10 03:02:58,550 INFO L226 Difference]: Without dead ends: 259 [2022-02-10 03:02:58,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:02:58,551 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:02:58,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 122 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 270 Invalid, 0 Unknown, 225 Unchecked, 0.1s Time] [2022-02-10 03:02:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-02-10 03:02:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 207. [2022-02-10 03:02:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.2281553398058254) internal successors, (459), 206 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 459 transitions. [2022-02-10 03:02:58,556 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 459 transitions. Word has length 24 [2022-02-10 03:02:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:02:58,557 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 459 transitions. [2022-02-10 03:02:58,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:02:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 459 transitions. [2022-02-10 03:02:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:02:58,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:02:58,558 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:02:58,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-10 03:02:58,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-10 03:02:58,781 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:02:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:02:58,781 INFO L85 PathProgramCache]: Analyzing trace with hash 453713003, now seen corresponding path program 8 times [2022-02-10 03:02:58,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:02:58,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340154499] [2022-02-10 03:02:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:02:58,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:02:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:02:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:59,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:02:59,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340154499] [2022-02-10 03:02:59,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340154499] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:02:59,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890086032] [2022-02-10 03:02:59,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:02:59,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:02:59,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:02:59,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:02:59,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-10 03:02:59,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:02:59,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:02:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:02:59,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:02:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:59,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:02:59,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:59,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:02:59,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:02:59,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:02:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:02:59,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:00,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:00,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:03:00,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:00,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:03:00,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:00,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:03:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:00,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890086032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:00,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:00,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:00,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961029800] [2022-02-10 03:03:00,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:00,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:00,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:00,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:00,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:00,313 INFO L87 Difference]: Start difference. First operand 207 states and 459 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:00,494 INFO L93 Difference]: Finished difference Result 250 states and 542 transitions. [2022-02-10 03:03:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:03:00,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:00,496 INFO L225 Difference]: With dead ends: 250 [2022-02-10 03:03:00,496 INFO L226 Difference]: Without dead ends: 245 [2022-02-10 03:03:00,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:00,496 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:00,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 120 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 414 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-02-10 03:03:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-10 03:03:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 209. [2022-02-10 03:03:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2163461538461537) internal successors, (461), 208 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2022-02-10 03:03:00,508 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 24 [2022-02-10 03:03:00,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:00,508 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2022-02-10 03:03:00,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:00,508 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2022-02-10 03:03:00,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:00,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:00,509 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:00,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:00,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-10 03:03:00,719 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:00,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1294495173, now seen corresponding path program 9 times [2022-02-10 03:03:00,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:00,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010425264] [2022-02-10 03:03:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:00,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:00,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:00,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010425264] [2022-02-10 03:03:00,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010425264] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:00,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024530730] [2022-02-10 03:03:00,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:00,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:00,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:00,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:00,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-10 03:03:01,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:03:01,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:01,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:01,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:01,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:03:01,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:01,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:03:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:01,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:02,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:02,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:03:02,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:02,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 97 [2022-02-10 03:03:02,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:02,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 77 [2022-02-10 03:03:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:02,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024530730] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:02,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:02,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:02,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070489991] [2022-02-10 03:03:02,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:02,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:02,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:02,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:02,482 INFO L87 Difference]: Start difference. First operand 209 states and 461 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:03,352 INFO L93 Difference]: Finished difference Result 317 states and 671 transitions. [2022-02-10 03:03:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:03:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:03,354 INFO L225 Difference]: With dead ends: 317 [2022-02-10 03:03:03,354 INFO L226 Difference]: Without dead ends: 289 [2022-02-10 03:03:03,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:03:03,355 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:03,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 133 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 408 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-02-10 03:03:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-10 03:03:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 235. [2022-02-10 03:03:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.2948717948717947) internal successors, (537), 234 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 537 transitions. [2022-02-10 03:03:03,362 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 537 transitions. Word has length 24 [2022-02-10 03:03:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:03,362 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 537 transitions. [2022-02-10 03:03:03,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 537 transitions. [2022-02-10 03:03:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:03,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:03,363 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:03,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:03,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-10 03:03:03,579 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:03,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:03,580 INFO L85 PathProgramCache]: Analyzing trace with hash 999233443, now seen corresponding path program 10 times [2022-02-10 03:03:03,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:03,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254498320] [2022-02-10 03:03:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:03,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:03,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:03,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254498320] [2022-02-10 03:03:03,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254498320] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:03,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718166713] [2022-02-10 03:03:03,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:03,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:03,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:03,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:03,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-10 03:03:03,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:04,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:04,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:04,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:03:04,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:04,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:04,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:05,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:05,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-10 03:03:05,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:05,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-02-10 03:03:05,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:05,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-02-10 03:03:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:05,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718166713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:05,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:05,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:05,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420465825] [2022-02-10 03:03:05,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:05,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:05,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:05,540 INFO L87 Difference]: Start difference. First operand 235 states and 537 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:06,847 INFO L93 Difference]: Finished difference Result 395 states and 828 transitions. [2022-02-10 03:03:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:03:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:06,850 INFO L225 Difference]: With dead ends: 395 [2022-02-10 03:03:06,850 INFO L226 Difference]: Without dead ends: 362 [2022-02-10 03:03:06,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:03:06,852 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:06,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 260 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 769 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-02-10 03:03:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-02-10 03:03:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 247. [2022-02-10 03:03:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.369918699186992) internal successors, (583), 246 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 583 transitions. [2022-02-10 03:03:06,860 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 583 transitions. Word has length 24 [2022-02-10 03:03:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:06,860 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 583 transitions. [2022-02-10 03:03:06,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 583 transitions. [2022-02-10 03:03:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:06,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:06,861 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:06,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:07,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-10 03:03:07,063 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:07,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1728518221, now seen corresponding path program 11 times [2022-02-10 03:03:07,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:07,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536314673] [2022-02-10 03:03:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:07,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:07,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:07,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536314673] [2022-02-10 03:03:07,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536314673] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:07,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930852111] [2022-02-10 03:03:07,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:07,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:07,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:07,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:07,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-10 03:03:07,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:03:07,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:07,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:07,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:07,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:03:07,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:07,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:03:07,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:07,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:07,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:08,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:08,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 120 [2022-02-10 03:03:08,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:08,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 70 [2022-02-10 03:03:08,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:08,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2022-02-10 03:03:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:08,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930852111] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:08,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:08,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:08,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116530480] [2022-02-10 03:03:08,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:08,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:08,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:08,811 INFO L87 Difference]: Start difference. First operand 247 states and 583 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:09,186 INFO L93 Difference]: Finished difference Result 286 states and 656 transitions. [2022-02-10 03:03:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:03:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:09,188 INFO L225 Difference]: With dead ends: 286 [2022-02-10 03:03:09,188 INFO L226 Difference]: Without dead ends: 281 [2022-02-10 03:03:09,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:03:09,189 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:09,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 132 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-02-10 03:03:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-10 03:03:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2022-02-10 03:03:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.376518218623482) internal successors, (587), 247 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 587 transitions. [2022-02-10 03:03:09,197 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 587 transitions. Word has length 24 [2022-02-10 03:03:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:09,197 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 587 transitions. [2022-02-10 03:03:09,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 587 transitions. [2022-02-10 03:03:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:09,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:09,198 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:09,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:09,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:09,399 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:09,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1497114423, now seen corresponding path program 12 times [2022-02-10 03:03:09,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:09,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506376436] [2022-02-10 03:03:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:09,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:09,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:09,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506376436] [2022-02-10 03:03:09,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506376436] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:09,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934219793] [2022-02-10 03:03:09,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:09,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:09,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:09,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-10 03:03:09,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:03:09,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:09,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:09,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:09,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:10,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:10,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:03:10,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:10,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-02-10 03:03:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:10,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:10,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:10,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-02-10 03:03:11,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:11,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 108 [2022-02-10 03:03:11,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:11,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-02-10 03:03:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:11,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934219793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:11,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:11,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:11,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827074770] [2022-02-10 03:03:11,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:11,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:11,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:11,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:11,213 INFO L87 Difference]: Start difference. First operand 248 states and 587 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:11,647 INFO L93 Difference]: Finished difference Result 328 states and 733 transitions. [2022-02-10 03:03:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:03:11,647 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:11,648 INFO L225 Difference]: With dead ends: 328 [2022-02-10 03:03:11,648 INFO L226 Difference]: Without dead ends: 304 [2022-02-10 03:03:11,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:03:11,649 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:11,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 144 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 408 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-02-10 03:03:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-10 03:03:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2022-02-10 03:03:11,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.402390438247012) internal successors, (603), 251 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 603 transitions. [2022-02-10 03:03:11,656 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 603 transitions. Word has length 24 [2022-02-10 03:03:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:11,656 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 603 transitions. [2022-02-10 03:03:11,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 603 transitions. [2022-02-10 03:03:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:11,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:11,657 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:11,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:11,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-02-10 03:03:11,871 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2044506087, now seen corresponding path program 13 times [2022-02-10 03:03:11,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:11,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371978498] [2022-02-10 03:03:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:11,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:12,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:12,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371978498] [2022-02-10 03:03:12,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371978498] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:12,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594434995] [2022-02-10 03:03:12,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:12,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:12,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:12,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:12,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-10 03:03:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:12,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:12,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:12,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:12,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:12,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:03:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:12,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:12,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:13,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:13,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-02-10 03:03:13,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:13,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 108 [2022-02-10 03:03:13,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:13,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-02-10 03:03:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:13,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594434995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:13,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:13,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:13,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239560937] [2022-02-10 03:03:13,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:13,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:13,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:13,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:13,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:13,393 INFO L87 Difference]: Start difference. First operand 252 states and 603 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:14,084 INFO L93 Difference]: Finished difference Result 319 states and 704 transitions. [2022-02-10 03:03:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:03:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:14,088 INFO L225 Difference]: With dead ends: 319 [2022-02-10 03:03:14,088 INFO L226 Difference]: Without dead ends: 298 [2022-02-10 03:03:14,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:03:14,089 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:14,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 157 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 490 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2022-02-10 03:03:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-10 03:03:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 253. [2022-02-10 03:03:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.384920634920635) internal successors, (601), 252 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 601 transitions. [2022-02-10 03:03:14,098 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 601 transitions. Word has length 24 [2022-02-10 03:03:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:14,098 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 601 transitions. [2022-02-10 03:03:14,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 601 transitions. [2022-02-10 03:03:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:14,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:14,100 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:14,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:14,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:14,303 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1670509611, now seen corresponding path program 14 times [2022-02-10 03:03:14,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:14,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617031369] [2022-02-10 03:03:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:14,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:14,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:14,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617031369] [2022-02-10 03:03:14,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617031369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:14,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940771621] [2022-02-10 03:03:14,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:14,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:14,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:14,556 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:14,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-10 03:03:14,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:14,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:14,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:14,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:14,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:14,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:03:14,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:14,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-02-10 03:03:14,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:14,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-02-10 03:03:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:14,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:15,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:15,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:03:15,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:15,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-02-10 03:03:15,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:15,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 99 [2022-02-10 03:03:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:15,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940771621] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:15,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:15,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:15,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504393727] [2022-02-10 03:03:15,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:15,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:15,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:15,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:15,782 INFO L87 Difference]: Start difference. First operand 253 states and 601 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:16,053 INFO L93 Difference]: Finished difference Result 293 states and 671 transitions. [2022-02-10 03:03:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:03:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:16,055 INFO L225 Difference]: With dead ends: 293 [2022-02-10 03:03:16,055 INFO L226 Difference]: Without dead ends: 288 [2022-02-10 03:03:16,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:03:16,056 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:16,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 438 Invalid, 0 Unknown, 174 Unchecked, 0.2s Time] [2022-02-10 03:03:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-10 03:03:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 255. [2022-02-10 03:03:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.374015748031496) internal successors, (603), 254 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 603 transitions. [2022-02-10 03:03:16,062 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 603 transitions. Word has length 24 [2022-02-10 03:03:16,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:16,062 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 603 transitions. [2022-02-10 03:03:16,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:16,063 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 603 transitions. [2022-02-10 03:03:16,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:16,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:16,063 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:16,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:16,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:16,283 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:16,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1257881539, now seen corresponding path program 15 times [2022-02-10 03:03:16,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:16,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417855418] [2022-02-10 03:03:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:16,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:16,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:16,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417855418] [2022-02-10 03:03:16,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417855418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:16,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945400417] [2022-02-10 03:03:16,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:16,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:16,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:16,572 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:16,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-10 03:03:16,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:03:16,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:16,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:16,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:16,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:16,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:16,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:16,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:03:16,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:16,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:03:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:16,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:17,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:17,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-10 03:03:17,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:17,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 68 [2022-02-10 03:03:17,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:17,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2022-02-10 03:03:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:17,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945400417] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:17,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:17,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:17,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939812855] [2022-02-10 03:03:17,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:17,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:17,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:17,733 INFO L87 Difference]: Start difference. First operand 255 states and 603 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:18,123 INFO L93 Difference]: Finished difference Result 310 states and 724 transitions. [2022-02-10 03:03:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:03:18,123 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:18,125 INFO L225 Difference]: With dead ends: 310 [2022-02-10 03:03:18,125 INFO L226 Difference]: Without dead ends: 305 [2022-02-10 03:03:18,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:03:18,125 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:18,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 174 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 446 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-02-10 03:03:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-10 03:03:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 257. [2022-02-10 03:03:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.37890625) internal successors, (609), 256 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 609 transitions. [2022-02-10 03:03:18,131 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 609 transitions. Word has length 24 [2022-02-10 03:03:18,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:18,132 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 609 transitions. [2022-02-10 03:03:18,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 609 transitions. [2022-02-10 03:03:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:18,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:18,133 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:18,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:18,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-10 03:03:18,356 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1553143269, now seen corresponding path program 16 times [2022-02-10 03:03:18,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:18,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532883972] [2022-02-10 03:03:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:18,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:18,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:18,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532883972] [2022-02-10 03:03:18,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532883972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:18,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86837972] [2022-02-10 03:03:18,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:18,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:18,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:18,683 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:18,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-10 03:03:18,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:18,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:18,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:18,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:18,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:03:18,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:18,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:19,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:19,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:19,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-10 03:03:20,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:20,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-02-10 03:03:20,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:20,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-02-10 03:03:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:20,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86837972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:20,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:20,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:20,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018553369] [2022-02-10 03:03:20,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:20,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:20,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:20,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:20,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:20,193 INFO L87 Difference]: Start difference. First operand 257 states and 609 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:21,609 INFO L93 Difference]: Finished difference Result 442 states and 953 transitions. [2022-02-10 03:03:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:03:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:21,611 INFO L225 Difference]: With dead ends: 442 [2022-02-10 03:03:21,611 INFO L226 Difference]: Without dead ends: 404 [2022-02-10 03:03:21,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:03:21,612 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:21,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 171 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 562 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-02-10 03:03:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-10 03:03:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 267. [2022-02-10 03:03:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.4323308270676693) internal successors, (647), 266 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 647 transitions. [2022-02-10 03:03:21,620 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 647 transitions. Word has length 24 [2022-02-10 03:03:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:21,620 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 647 transitions. [2022-02-10 03:03:21,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 647 transitions. [2022-02-10 03:03:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:21,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:21,621 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:21,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:21,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:21,827 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash -823858491, now seen corresponding path program 17 times [2022-02-10 03:03:21,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:21,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730675983] [2022-02-10 03:03:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:21,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:22,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:22,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730675983] [2022-02-10 03:03:22,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730675983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:22,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885601619] [2022-02-10 03:03:22,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:22,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:22,150 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:22,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-10 03:03:22,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:03:22,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:22,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:22,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:22,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:03:22,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:22,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:03:22,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:22,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:22,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:23,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:23,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-02-10 03:03:23,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:23,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-02-10 03:03:23,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:23,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-10 03:03:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:23,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885601619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:23,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:23,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:23,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216227580] [2022-02-10 03:03:23,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:23,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:23,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:23,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:23,641 INFO L87 Difference]: Start difference. First operand 267 states and 647 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:24,068 INFO L93 Difference]: Finished difference Result 312 states and 736 transitions. [2022-02-10 03:03:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:03:24,069 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:24,071 INFO L225 Difference]: With dead ends: 312 [2022-02-10 03:03:24,071 INFO L226 Difference]: Without dead ends: 307 [2022-02-10 03:03:24,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:03:24,072 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:24,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 157 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 630 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-02-10 03:03:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-10 03:03:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 267. [2022-02-10 03:03:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.4323308270676693) internal successors, (647), 266 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 647 transitions. [2022-02-10 03:03:24,091 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 647 transitions. Word has length 24 [2022-02-10 03:03:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:24,091 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 647 transitions. [2022-02-10 03:03:24,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 647 transitions. [2022-02-10 03:03:24,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:24,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:24,093 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:24,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:24,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:24,307 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1579279569, now seen corresponding path program 18 times [2022-02-10 03:03:24,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:24,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427078850] [2022-02-10 03:03:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:24,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:24,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:24,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427078850] [2022-02-10 03:03:24,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427078850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:24,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477386900] [2022-02-10 03:03:24,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:24,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:24,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:24,569 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:24,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-10 03:03:24,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:03:24,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:24,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:24,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:24,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:24,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:24,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:03:24,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:24,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:03:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:24,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:25,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:25,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-10 03:03:25,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:25,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:03:25,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:25,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:03:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:25,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477386900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:25,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:25,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:03:25,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737677012] [2022-02-10 03:03:25,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:25,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:03:25,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:03:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:03:25,676 INFO L87 Difference]: Start difference. First operand 267 states and 647 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:26,342 INFO L93 Difference]: Finished difference Result 347 states and 821 transitions. [2022-02-10 03:03:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:03:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:26,343 INFO L225 Difference]: With dead ends: 347 [2022-02-10 03:03:26,343 INFO L226 Difference]: Without dead ends: 337 [2022-02-10 03:03:26,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:03:26,344 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:26,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 115 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 397 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-02-10 03:03:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-02-10 03:03:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 276. [2022-02-10 03:03:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.4545454545454546) internal successors, (675), 275 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 675 transitions. [2022-02-10 03:03:26,351 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 675 transitions. Word has length 24 [2022-02-10 03:03:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:26,351 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 675 transitions. [2022-02-10 03:03:26,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 675 transitions. [2022-02-10 03:03:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:26,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:26,352 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:26,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:26,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:26,571 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1874541299, now seen corresponding path program 19 times [2022-02-10 03:03:26,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:26,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881125764] [2022-02-10 03:03:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:26,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:26,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:26,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881125764] [2022-02-10 03:03:26,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881125764] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:26,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988447236] [2022-02-10 03:03:26,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:26,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:26,857 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:26,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-10 03:03:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:26,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:26,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:26,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:26,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:27,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:03:27,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:27,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:27,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:28,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:28,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:03:28,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:28,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 55 [2022-02-10 03:03:28,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:28,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-02-10 03:03:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:28,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988447236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:28,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:28,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:28,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346621834] [2022-02-10 03:03:28,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:28,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:28,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:28,415 INFO L87 Difference]: Start difference. First operand 276 states and 675 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:29,585 INFO L93 Difference]: Finished difference Result 479 states and 1057 transitions. [2022-02-10 03:03:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:03:29,585 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:29,587 INFO L225 Difference]: With dead ends: 479 [2022-02-10 03:03:29,587 INFO L226 Difference]: Without dead ends: 446 [2022-02-10 03:03:29,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:03:29,588 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 137 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:29,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 214 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 716 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2022-02-10 03:03:29,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-02-10 03:03:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 272. [2022-02-10 03:03:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.4464944649446494) internal successors, (663), 271 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 663 transitions. [2022-02-10 03:03:29,594 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 663 transitions. Word has length 24 [2022-02-10 03:03:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:29,594 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 663 transitions. [2022-02-10 03:03:29,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 663 transitions. [2022-02-10 03:03:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:29,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:29,595 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:29,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:29,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-10 03:03:29,818 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:29,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:29,818 INFO L85 PathProgramCache]: Analyzing trace with hash -732242867, now seen corresponding path program 20 times [2022-02-10 03:03:29,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:29,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894531008] [2022-02-10 03:03:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:29,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:30,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:30,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894531008] [2022-02-10 03:03:30,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894531008] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:30,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594085975] [2022-02-10 03:03:30,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:30,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:30,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:30,026 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:30,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-10 03:03:30,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:30,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:30,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:30,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:30,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:03:30,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:30,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:03:30,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:30,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:03:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:30,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:30,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:30,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-10 03:03:30,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:30,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:03:30,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:30,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:03:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:30,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594085975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:30,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:30,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:30,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417112578] [2022-02-10 03:03:30,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:30,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:30,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:30,953 INFO L87 Difference]: Start difference. First operand 272 states and 663 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:31,441 INFO L93 Difference]: Finished difference Result 354 states and 817 transitions. [2022-02-10 03:03:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:03:31,441 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:31,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:31,442 INFO L225 Difference]: With dead ends: 354 [2022-02-10 03:03:31,442 INFO L226 Difference]: Without dead ends: 339 [2022-02-10 03:03:31,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:03:31,443 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 78 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:31,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 121 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 496 Invalid, 0 Unknown, 3 Unchecked, 0.2s Time] [2022-02-10 03:03:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-10 03:03:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 284. [2022-02-10 03:03:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.4664310954063606) internal successors, (698), 283 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 698 transitions. [2022-02-10 03:03:31,449 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 698 transitions. Word has length 24 [2022-02-10 03:03:31,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:31,450 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 698 transitions. [2022-02-10 03:03:31,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:31,450 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 698 transitions. [2022-02-10 03:03:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:31,451 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:31,451 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:31,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-02-10 03:03:31,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-10 03:03:31,663 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:31,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:31,664 INFO L85 PathProgramCache]: Analyzing trace with hash -324336439, now seen corresponding path program 21 times [2022-02-10 03:03:31,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:31,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158701369] [2022-02-10 03:03:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:31,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:31,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:31,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158701369] [2022-02-10 03:03:31,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158701369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:31,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254490184] [2022-02-10 03:03:31,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:31,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:31,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:31,836 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:31,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-10 03:03:31,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:03:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:31,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:31,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:03:32,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:03:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:32,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:32,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:32,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:03:32,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:32,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-02-10 03:03:32,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:32,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2022-02-10 03:03:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:32,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254490184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:32,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:32,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-10 03:03:32,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930079787] [2022-02-10 03:03:32,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:32,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:03:32,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:03:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:03:32,721 INFO L87 Difference]: Start difference. First operand 284 states and 698 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:33,090 INFO L93 Difference]: Finished difference Result 362 states and 839 transitions. [2022-02-10 03:03:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:03:33,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:33,091 INFO L225 Difference]: With dead ends: 362 [2022-02-10 03:03:33,091 INFO L226 Difference]: Without dead ends: 338 [2022-02-10 03:03:33,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:03:33,092 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:33,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 129 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:03:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-10 03:03:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 284. [2022-02-10 03:03:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.4664310954063606) internal successors, (698), 283 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 698 transitions. [2022-02-10 03:03:33,098 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 698 transitions. Word has length 24 [2022-02-10 03:03:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:33,098 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 698 transitions. [2022-02-10 03:03:33,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 698 transitions. [2022-02-10 03:03:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:33,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:33,099 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:33,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:33,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-10 03:03:33,307 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -887515477, now seen corresponding path program 22 times [2022-02-10 03:03:33,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:33,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524946744] [2022-02-10 03:03:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:33,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:33,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:33,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524946744] [2022-02-10 03:03:33,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524946744] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:33,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674151506] [2022-02-10 03:03:33,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:33,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:33,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:33,564 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:33,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-10 03:03:33,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:33,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:33,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:33,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:34,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:34,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-10 03:03:34,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:34,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:03:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:34,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:34,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:34,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:03:34,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:34,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:03:34,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:34,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-02-10 03:03:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:35,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674151506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:35,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:35,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:35,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231130396] [2022-02-10 03:03:35,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:35,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:35,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:35,029 INFO L87 Difference]: Start difference. First operand 284 states and 698 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:35,275 INFO L93 Difference]: Finished difference Result 341 states and 811 transitions. [2022-02-10 03:03:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:03:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:35,277 INFO L225 Difference]: With dead ends: 341 [2022-02-10 03:03:35,277 INFO L226 Difference]: Without dead ends: 336 [2022-02-10 03:03:35,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:03:35,278 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:35,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 128 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 396 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-02-10 03:03:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-02-10 03:03:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 285. [2022-02-10 03:03:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.471830985915493) internal successors, (702), 284 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 702 transitions. [2022-02-10 03:03:35,284 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 702 transitions. Word has length 24 [2022-02-10 03:03:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:35,284 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 702 transitions. [2022-02-10 03:03:35,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 702 transitions. [2022-02-10 03:03:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:35,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:35,285 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:35,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:35,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:35,512 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:35,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:35,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1640862263, now seen corresponding path program 23 times [2022-02-10 03:03:35,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:35,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938728027] [2022-02-10 03:03:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:35,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:35,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:35,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938728027] [2022-02-10 03:03:35,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938728027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:35,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545477058] [2022-02-10 03:03:35,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:35,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:35,733 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:35,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-10 03:03:35,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:03:35,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:35,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:35,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:35,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:35,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:36,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:36,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:03:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:36,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:36,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:36,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:36,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:03:36,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:36,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:03:36,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:36,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:03:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:36,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545477058] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:36,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:36,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:36,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290632783] [2022-02-10 03:03:36,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:36,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:36,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:36,971 INFO L87 Difference]: Start difference. First operand 285 states and 702 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:37,230 INFO L93 Difference]: Finished difference Result 326 states and 776 transitions. [2022-02-10 03:03:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:03:37,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:37,231 INFO L225 Difference]: With dead ends: 326 [2022-02-10 03:03:37,231 INFO L226 Difference]: Without dead ends: 321 [2022-02-10 03:03:37,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:03:37,232 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:37,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 166 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 500 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-02-10 03:03:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-10 03:03:37,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 284. [2022-02-10 03:03:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.4664310954063606) internal successors, (698), 283 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 698 transitions. [2022-02-10 03:03:37,237 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 698 transitions. Word has length 24 [2022-02-10 03:03:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:37,238 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 698 transitions. [2022-02-10 03:03:37,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 698 transitions. [2022-02-10 03:03:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:37,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:37,239 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:37,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:37,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:37,443 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash 245476161, now seen corresponding path program 24 times [2022-02-10 03:03:37,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:37,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610645230] [2022-02-10 03:03:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:37,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:37,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:37,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610645230] [2022-02-10 03:03:37,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610645230] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:37,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015376681] [2022-02-10 03:03:37,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:37,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:37,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:37,694 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:37,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-10 03:03:37,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:03:37,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:37,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:37,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:37,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:38,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:38,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-10 03:03:38,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:38,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:03:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:38,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:38,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:38,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-02-10 03:03:38,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:38,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-02-10 03:03:38,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:38,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 78 [2022-02-10 03:03:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:38,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015376681] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:38,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:38,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:38,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107749372] [2022-02-10 03:03:38,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:38,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:38,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:38,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:38,988 INFO L87 Difference]: Start difference. First operand 284 states and 698 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:39,145 INFO L93 Difference]: Finished difference Result 333 states and 786 transitions. [2022-02-10 03:03:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:03:39,146 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:39,147 INFO L225 Difference]: With dead ends: 333 [2022-02-10 03:03:39,147 INFO L226 Difference]: Without dead ends: 314 [2022-02-10 03:03:39,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:39,148 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:39,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 136 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 375 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-02-10 03:03:39,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-10 03:03:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 286. [2022-02-10 03:03:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4771929824561405) internal successors, (706), 285 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 706 transitions. [2022-02-10 03:03:39,153 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 706 transitions. Word has length 24 [2022-02-10 03:03:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:39,153 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 706 transitions. [2022-02-10 03:03:39,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 706 transitions. [2022-02-10 03:03:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:39,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:39,154 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:39,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:39,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-02-10 03:03:39,359 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash -507870625, now seen corresponding path program 25 times [2022-02-10 03:03:39,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:39,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759820510] [2022-02-10 03:03:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:39,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:39,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:39,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759820510] [2022-02-10 03:03:39,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759820510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:39,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006493902] [2022-02-10 03:03:39,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:39,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:39,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:39,632 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:39,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-10 03:03:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:39,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:39,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:39,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:39,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:39,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:03:39,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:39,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:40,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:40,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:40,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-02-10 03:03:40,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:40,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 104 [2022-02-10 03:03:40,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:40,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 82 [2022-02-10 03:03:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:40,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006493902] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:40,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:40,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:40,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374734966] [2022-02-10 03:03:40,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:40,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:40,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:40,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:40,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:40,961 INFO L87 Difference]: Start difference. First operand 286 states and 706 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:41,595 INFO L93 Difference]: Finished difference Result 358 states and 814 transitions. [2022-02-10 03:03:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:03:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:41,596 INFO L225 Difference]: With dead ends: 358 [2022-02-10 03:03:41,596 INFO L226 Difference]: Without dead ends: 337 [2022-02-10 03:03:41,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:03:41,597 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:41,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 173 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 596 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-02-10 03:03:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-02-10 03:03:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 294. [2022-02-10 03:03:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4573378839590445) internal successors, (720), 293 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 720 transitions. [2022-02-10 03:03:41,602 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 720 transitions. Word has length 24 [2022-02-10 03:03:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:41,603 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 720 transitions. [2022-02-10 03:03:41,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 720 transitions. [2022-02-10 03:03:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:41,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:41,604 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:41,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:41,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-10 03:03:41,817 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:41,818 INFO L85 PathProgramCache]: Analyzing trace with hash 72080973, now seen corresponding path program 26 times [2022-02-10 03:03:41,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:41,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200006358] [2022-02-10 03:03:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:41,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:42,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:42,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200006358] [2022-02-10 03:03:42,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200006358] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:42,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460949712] [2022-02-10 03:03:42,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:42,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:42,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:42,160 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:42,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-10 03:03:42,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:42,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:42,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:42,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-10 03:03:42,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:42,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:03:42,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:42,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:42,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:42,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:42,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:03:43,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:43,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-02-10 03:03:43,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:43,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-02-10 03:03:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:43,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460949712] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:43,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:43,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:43,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656108068] [2022-02-10 03:03:43,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:43,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:43,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:43,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:43,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:43,263 INFO L87 Difference]: Start difference. First operand 294 states and 720 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:43,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:43,586 INFO L93 Difference]: Finished difference Result 333 states and 788 transitions. [2022-02-10 03:03:43,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:03:43,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:43,588 INFO L225 Difference]: With dead ends: 333 [2022-02-10 03:03:43,589 INFO L226 Difference]: Without dead ends: 328 [2022-02-10 03:03:43,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:03:43,589 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:43,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 120 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 547 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-02-10 03:03:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-10 03:03:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 294. [2022-02-10 03:03:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4573378839590445) internal successors, (720), 293 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 720 transitions. [2022-02-10 03:03:43,595 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 720 transitions. Word has length 24 [2022-02-10 03:03:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:43,595 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 720 transitions. [2022-02-10 03:03:43,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 720 transitions. [2022-02-10 03:03:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:43,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:43,596 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:43,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:43,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:43,807 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:43,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash 628061365, now seen corresponding path program 27 times [2022-02-10 03:03:43,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:43,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926335380] [2022-02-10 03:03:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:43,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:44,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:44,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926335380] [2022-02-10 03:03:44,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926335380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:44,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323036016] [2022-02-10 03:03:44,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:44,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:44,096 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:44,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-10 03:03:44,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:03:44,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:44,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:44,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:44,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:44,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:44,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:03:44,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:44,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:03:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:44,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:45,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:45,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:03:45,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:45,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 101 [2022-02-10 03:03:45,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:45,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 81 [2022-02-10 03:03:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:45,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323036016] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:45,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:45,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:45,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905831110] [2022-02-10 03:03:45,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:45,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:45,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:45,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:45,503 INFO L87 Difference]: Start difference. First operand 294 states and 720 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:46,286 INFO L93 Difference]: Finished difference Result 380 states and 887 transitions. [2022-02-10 03:03:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:03:46,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:46,288 INFO L225 Difference]: With dead ends: 380 [2022-02-10 03:03:46,288 INFO L226 Difference]: Without dead ends: 352 [2022-02-10 03:03:46,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:03:46,288 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:46,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 136 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 371 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-02-10 03:03:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-10 03:03:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 296. [2022-02-10 03:03:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.461016949152542) internal successors, (726), 295 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 726 transitions. [2022-02-10 03:03:46,294 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 726 transitions. Word has length 24 [2022-02-10 03:03:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:46,294 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 726 transitions. [2022-02-10 03:03:46,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 726 transitions. [2022-02-10 03:03:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:46,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:46,295 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:46,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-10 03:03:46,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:46,519 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 332799635, now seen corresponding path program 28 times [2022-02-10 03:03:46,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:46,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989682732] [2022-02-10 03:03:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:46,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:46,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:46,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989682732] [2022-02-10 03:03:46,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989682732] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:46,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462366363] [2022-02-10 03:03:46,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:03:46,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:46,833 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:46,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-10 03:03:46,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:03:46,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:46,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:46,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:46,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:47,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:47,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:03:47,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:47,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:47,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:48,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:48,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:03:48,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:48,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 97 [2022-02-10 03:03:48,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:48,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 77 [2022-02-10 03:03:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:48,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462366363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:48,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:48,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:48,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105611649] [2022-02-10 03:03:48,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:48,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:48,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:48,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:48,430 INFO L87 Difference]: Start difference. First operand 296 states and 726 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:49,917 INFO L93 Difference]: Finished difference Result 462 states and 1035 transitions. [2022-02-10 03:03:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:03:49,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:49,918 INFO L225 Difference]: With dead ends: 462 [2022-02-10 03:03:49,918 INFO L226 Difference]: Without dead ends: 424 [2022-02-10 03:03:49,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:03:49,919 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:49,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 239 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 780 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2022-02-10 03:03:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-02-10 03:03:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 296. [2022-02-10 03:03:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.461016949152542) internal successors, (726), 295 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 726 transitions. [2022-02-10 03:03:49,926 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 726 transitions. Word has length 24 [2022-02-10 03:03:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:49,926 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 726 transitions. [2022-02-10 03:03:49,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 726 transitions. [2022-02-10 03:03:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:49,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:49,927 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:49,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:50,147 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1062084413, now seen corresponding path program 29 times [2022-02-10 03:03:50,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:50,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079189700] [2022-02-10 03:03:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:50,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:50,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:50,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079189700] [2022-02-10 03:03:50,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079189700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:50,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797864363] [2022-02-10 03:03:50,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:03:50,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:50,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:50,412 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:50,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-10 03:03:50,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:03:50,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:50,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:50,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:03:50,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:50,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:03:50,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:50,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:50,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:51,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:51,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-02-10 03:03:51,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:51,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-02-10 03:03:51,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:51,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-10 03:03:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:51,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797864363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:51,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:51,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:03:51,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992586848] [2022-02-10 03:03:51,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:51,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:03:51,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:51,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:03:51,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:03:51,931 INFO L87 Difference]: Start difference. First operand 296 states and 726 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:52,311 INFO L93 Difference]: Finished difference Result 328 states and 801 transitions. [2022-02-10 03:03:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:03:52,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:52,313 INFO L225 Difference]: With dead ends: 328 [2022-02-10 03:03:52,313 INFO L226 Difference]: Without dead ends: 323 [2022-02-10 03:03:52,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:03:52,313 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:52,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 107 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 405 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-02-10 03:03:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-10 03:03:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 296. [2022-02-10 03:03:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.461016949152542) internal successors, (726), 295 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 726 transitions. [2022-02-10 03:03:52,319 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 726 transitions. Word has length 24 [2022-02-10 03:03:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:52,320 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 726 transitions. [2022-02-10 03:03:52,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 726 transitions. [2022-02-10 03:03:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:52,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:52,321 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:52,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:52,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-10 03:03:52,547 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:52,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:52,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2131419065, now seen corresponding path program 30 times [2022-02-10 03:03:52,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:52,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573748113] [2022-02-10 03:03:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:52,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:52,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:52,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573748113] [2022-02-10 03:03:52,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573748113] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:52,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980184773] [2022-02-10 03:03:52,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:03:52,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:52,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:52,816 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:52,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-10 03:03:52,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:03:52,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:52,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:52,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:53,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:53,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:03:53,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:53,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-10 03:03:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:53,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:53,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:53,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-02-10 03:03:54,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:54,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 108 [2022-02-10 03:03:54,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:54,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-02-10 03:03:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:54,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980184773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:54,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:54,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:54,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103896269] [2022-02-10 03:03:54,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:54,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:54,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:54,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:54,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:54,139 INFO L87 Difference]: Start difference. First operand 296 states and 726 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:54,445 INFO L93 Difference]: Finished difference Result 363 states and 853 transitions. [2022-02-10 03:03:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:03:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:54,447 INFO L225 Difference]: With dead ends: 363 [2022-02-10 03:03:54,447 INFO L226 Difference]: Without dead ends: 339 [2022-02-10 03:03:54,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:03:54,447 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:54,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 134 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 421 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-02-10 03:03:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-10 03:03:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 300. [2022-02-10 03:03:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.4816053511705687) internal successors, (742), 299 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 742 transitions. [2022-02-10 03:03:54,453 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 742 transitions. Word has length 24 [2022-02-10 03:03:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:54,453 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 742 transitions. [2022-02-10 03:03:54,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 742 transitions. [2022-02-10 03:03:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:54,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:54,454 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:54,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:54,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-10 03:03:54,667 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:54,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1378072279, now seen corresponding path program 31 times [2022-02-10 03:03:54,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:54,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954064185] [2022-02-10 03:03:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:54,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:54,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:54,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954064185] [2022-02-10 03:03:54,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954064185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:54,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235315330] [2022-02-10 03:03:54,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:03:54,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:54,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:54,905 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:54,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-10 03:03:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:54,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:55,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:55,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:55,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:55,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:03:55,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:55,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:03:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:55,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:55,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:55,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-02-10 03:03:56,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:56,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 108 [2022-02-10 03:03:56,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:56,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-02-10 03:03:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:56,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235315330] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:56,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:56,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:56,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216256103] [2022-02-10 03:03:56,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:56,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:56,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:56,227 INFO L87 Difference]: Start difference. First operand 300 states and 742 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:57,025 INFO L93 Difference]: Finished difference Result 388 states and 883 transitions. [2022-02-10 03:03:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:03:57,026 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:57,028 INFO L225 Difference]: With dead ends: 388 [2022-02-10 03:03:57,028 INFO L226 Difference]: Without dead ends: 367 [2022-02-10 03:03:57,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:03:57,028 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:57,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 218 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 674 Invalid, 0 Unknown, 179 Unchecked, 0.3s Time] [2022-02-10 03:03:57,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-10 03:03:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 297. [2022-02-10 03:03:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.4662162162162162) internal successors, (730), 296 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 730 transitions. [2022-02-10 03:03:57,034 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 730 transitions. Word has length 24 [2022-02-10 03:03:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:57,034 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 730 transitions. [2022-02-10 03:03:57,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 730 transitions. [2022-02-10 03:03:57,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:57,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:57,035 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:57,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:57,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-10 03:03:57,243 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:57,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1958023877, now seen corresponding path program 32 times [2022-02-10 03:03:57,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:57,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100545203] [2022-02-10 03:03:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:57,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:57,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:57,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100545203] [2022-02-10 03:03:57,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100545203] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:57,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118234800] [2022-02-10 03:03:57,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:03:57,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:57,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:57,520 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:57,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-10 03:03:57,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:03:57,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:57,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:03:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:57,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:57,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:03:57,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:57,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-02-10 03:03:57,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:57,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-02-10 03:03:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:57,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:03:58,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:58,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:03:58,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:58,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-02-10 03:03:58,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:03:58,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 99 [2022-02-10 03:03:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:58,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118234800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:03:58,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:03:58,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:03:58,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658176279] [2022-02-10 03:03:58,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:03:58,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:03:58,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:03:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:03:58,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:03:58,703 INFO L87 Difference]: Start difference. First operand 297 states and 730 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:03:59,026 INFO L93 Difference]: Finished difference Result 324 states and 784 transitions. [2022-02-10 03:03:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:03:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:03:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:03:59,028 INFO L225 Difference]: With dead ends: 324 [2022-02-10 03:03:59,028 INFO L226 Difference]: Without dead ends: 319 [2022-02-10 03:03:59,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:03:59,029 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:03:59,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 113 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 483 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-02-10 03:03:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-02-10 03:03:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 297. [2022-02-10 03:03:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.4662162162162162) internal successors, (730), 296 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 730 transitions. [2022-02-10 03:03:59,034 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 730 transitions. Word has length 24 [2022-02-10 03:03:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:03:59,034 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 730 transitions. [2022-02-10 03:03:59,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:03:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 730 transitions. [2022-02-10 03:03:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:03:59,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:03:59,035 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:03:59,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-10 03:03:59,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-10 03:03:59,251 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:03:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:03:59,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1094295663, now seen corresponding path program 33 times [2022-02-10 03:03:59,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:03:59,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283041646] [2022-02-10 03:03:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:03:59,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:03:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:03:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:03:59,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:03:59,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283041646] [2022-02-10 03:03:59,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283041646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:03:59,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842432069] [2022-02-10 03:03:59,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:03:59,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:03:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:03:59,512 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:03:59,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-10 03:03:59,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:03:59,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:03:59,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:03:59,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:03:59,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:59,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:03:59,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:03:59,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:04:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:00,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:00,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:00,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:04:00,919 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:00,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-10 03:04:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:00,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842432069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:00,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:00,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:04:00,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383968627] [2022-02-10 03:04:00,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:00,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:04:00,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:04:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:00,926 INFO L87 Difference]: Start difference. First operand 297 states and 730 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:01,461 INFO L93 Difference]: Finished difference Result 378 states and 898 transitions. [2022-02-10 03:04:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:04:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:01,463 INFO L225 Difference]: With dead ends: 378 [2022-02-10 03:04:01,463 INFO L226 Difference]: Without dead ends: 355 [2022-02-10 03:04:01,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:04:01,463 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:01,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 159 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 447 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-02-10 03:04:01,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-02-10 03:04:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 298. [2022-02-10 03:04:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.468013468013468) internal successors, (733), 297 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 733 transitions. [2022-02-10 03:04:01,469 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 733 transitions. Word has length 24 [2022-02-10 03:04:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:01,469 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 733 transitions. [2022-02-10 03:04:01,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 733 transitions. [2022-02-10 03:04:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:01,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:01,470 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:01,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:01,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:01,679 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash 799033933, now seen corresponding path program 34 times [2022-02-10 03:04:01,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:01,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271381942] [2022-02-10 03:04:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:01,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:01,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:01,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271381942] [2022-02-10 03:04:01,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271381942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:01,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436873350] [2022-02-10 03:04:01,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:04:01,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:01,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:01,964 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:01,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-10 03:04:01,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:04:01,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:01,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:04:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:02,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:02,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:02,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:02,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:04:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:02,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:03,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:03,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-10 03:04:03,458 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:03,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-10 03:04:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:03,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436873350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:03,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:03,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-10 03:04:03,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410129890] [2022-02-10 03:04:03,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:03,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:04:03,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:04:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:04:03,465 INFO L87 Difference]: Start difference. First operand 298 states and 733 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:04,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:04,575 INFO L93 Difference]: Finished difference Result 478 states and 1080 transitions. [2022-02-10 03:04:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:04:04,575 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:04,577 INFO L225 Difference]: With dead ends: 478 [2022-02-10 03:04:04,577 INFO L226 Difference]: Without dead ends: 445 [2022-02-10 03:04:04,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:04:04,577 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 139 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:04,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 253 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 683 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2022-02-10 03:04:04,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-02-10 03:04:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 297. [2022-02-10 03:04:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.4662162162162162) internal successors, (730), 296 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 730 transitions. [2022-02-10 03:04:04,584 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 730 transitions. Word has length 24 [2022-02-10 03:04:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:04,584 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 730 transitions. [2022-02-10 03:04:04,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 730 transitions. [2022-02-10 03:04:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:04,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:04,585 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:04,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:04,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-10 03:04:04,795 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1786059755, now seen corresponding path program 35 times [2022-02-10 03:04:04,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:04,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525553453] [2022-02-10 03:04:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:04,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:05,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:05,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525553453] [2022-02-10 03:04:05,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525553453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:05,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807307355] [2022-02-10 03:04:05,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:04:05,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:05,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:05,038 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:05,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-10 03:04:05,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:04:05,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:05,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:05,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:05,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:05,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:05,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:05,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-10 03:04:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:05,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:05,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:05,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-02-10 03:04:06,091 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:06,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:04:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:06,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807307355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:06,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:06,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:04:06,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598155560] [2022-02-10 03:04:06,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:06,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:04:06,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:04:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:06,098 INFO L87 Difference]: Start difference. First operand 297 states and 730 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:06,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:06,369 INFO L93 Difference]: Finished difference Result 342 states and 833 transitions. [2022-02-10 03:04:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:04:06,369 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:06,371 INFO L225 Difference]: With dead ends: 342 [2022-02-10 03:04:06,371 INFO L226 Difference]: Without dead ends: 337 [2022-02-10 03:04:06,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:04:06,371 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:06,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 149 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 367 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-02-10 03:04:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-02-10 03:04:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 298. [2022-02-10 03:04:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.4713804713804715) internal successors, (734), 297 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 734 transitions. [2022-02-10 03:04:06,377 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 734 transitions. Word has length 24 [2022-02-10 03:04:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:06,377 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 734 transitions. [2022-02-10 03:04:06,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 734 transitions. [2022-02-10 03:04:06,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:06,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:06,378 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:06,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:06,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:06,595 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1032712969, now seen corresponding path program 36 times [2022-02-10 03:04:06,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:06,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551474704] [2022-02-10 03:04:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:06,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:06,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:06,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551474704] [2022-02-10 03:04:06,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551474704] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:06,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206731316] [2022-02-10 03:04:06,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:04:06,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:06,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:06,792 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:06,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-10 03:04:06,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:04:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:06,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:06,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:06,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:07,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:07,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:04:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:07,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:07,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:07,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:04:08,016 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:08,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:04:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:08,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206731316] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:08,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:08,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:04:08,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440404967] [2022-02-10 03:04:08,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:08,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:04:08,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:08,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:04:08,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:08,023 INFO L87 Difference]: Start difference. First operand 298 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:08,218 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2022-02-10 03:04:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:04:08,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:08,219 INFO L225 Difference]: With dead ends: 333 [2022-02-10 03:04:08,220 INFO L226 Difference]: Without dead ends: 328 [2022-02-10 03:04:08,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:04:08,220 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:08,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 100 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 341 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-02-10 03:04:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-10 03:04:08,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 297. [2022-02-10 03:04:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.4662162162162162) internal successors, (730), 296 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 730 transitions. [2022-02-10 03:04:08,224 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 730 transitions. Word has length 24 [2022-02-10 03:04:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:08,224 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 730 transitions. [2022-02-10 03:04:08,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 730 transitions. [2022-02-10 03:04:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:08,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:08,224 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:08,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:08,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:08,425 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:08,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:08,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1107421835, now seen corresponding path program 37 times [2022-02-10 03:04:08,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:08,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562174874] [2022-02-10 03:04:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:08,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:08,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:08,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562174874] [2022-02-10 03:04:08,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562174874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:08,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723214813] [2022-02-10 03:04:08,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:04:08,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:08,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:08,624 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:08,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-10 03:04:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:08,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:04:08,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:08,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:04:08,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:04:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:09,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:09,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:09,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:04:09,821 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:09,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-10 03:04:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:09,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723214813] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:09,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:09,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:04:09,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527121757] [2022-02-10 03:04:09,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:09,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:04:09,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:09,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:04:09,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:04:09,828 INFO L87 Difference]: Start difference. First operand 297 states and 730 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:10,664 INFO L93 Difference]: Finished difference Result 521 states and 1236 transitions. [2022-02-10 03:04:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:04:10,664 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:10,666 INFO L225 Difference]: With dead ends: 521 [2022-02-10 03:04:10,666 INFO L226 Difference]: Without dead ends: 498 [2022-02-10 03:04:10,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:04:10,666 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:10,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 231 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 698 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-02-10 03:04:10,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-10 03:04:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 304. [2022-02-10 03:04:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.4686468646864688) internal successors, (748), 303 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 748 transitions. [2022-02-10 03:04:10,673 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 748 transitions. Word has length 24 [2022-02-10 03:04:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:10,673 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 748 transitions. [2022-02-10 03:04:10,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 748 transitions. [2022-02-10 03:04:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:10,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:10,674 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:10,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:10,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-10 03:04:10,896 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:10,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1550216839, now seen corresponding path program 38 times [2022-02-10 03:04:10,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:10,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739354024] [2022-02-10 03:04:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:10,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:11,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:11,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739354024] [2022-02-10 03:04:11,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739354024] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:11,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489128704] [2022-02-10 03:04:11,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:04:11,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:11,068 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:11,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-10 03:04:11,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:04:11,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:11,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:11,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:11,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:04:11,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:04:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:11,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:11,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:11,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:04:12,175 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:12,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:04:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:12,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489128704] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:12,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:12,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:04:12,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310942275] [2022-02-10 03:04:12,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:12,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:04:12,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:04:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:04:12,182 INFO L87 Difference]: Start difference. First operand 304 states and 748 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:12,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:12,556 INFO L93 Difference]: Finished difference Result 453 states and 1109 transitions. [2022-02-10 03:04:12,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:04:12,556 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:12,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:12,557 INFO L225 Difference]: With dead ends: 453 [2022-02-10 03:04:12,557 INFO L226 Difference]: Without dead ends: 448 [2022-02-10 03:04:12,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:12,558 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:12,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 169 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 570 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-02-10 03:04:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-02-10 03:04:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 304. [2022-02-10 03:04:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.4686468646864688) internal successors, (748), 303 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 748 transitions. [2022-02-10 03:04:12,563 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 748 transitions. Word has length 24 [2022-02-10 03:04:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:12,563 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 748 transitions. [2022-02-10 03:04:12,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 748 transitions. [2022-02-10 03:04:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:12,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:12,564 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:12,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-10 03:04:12,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-10 03:04:12,779 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:12,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:12,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1486007227, now seen corresponding path program 39 times [2022-02-10 03:04:12,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:12,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026600666] [2022-02-10 03:04:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:12,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:12,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:12,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026600666] [2022-02-10 03:04:12,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026600666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:12,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619433235] [2022-02-10 03:04:12,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:04:12,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:12,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:13,000 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:13,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-10 03:04:13,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:04:13,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:13,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:13,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:13,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:04:13,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:04:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:13,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:13,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:13,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-10 03:04:13,769 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:13,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:04:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:13,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619433235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:13,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:13,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:04:13,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171504491] [2022-02-10 03:04:13,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:13,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:04:13,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:04:13,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:04:13,775 INFO L87 Difference]: Start difference. First operand 304 states and 748 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:14,264 INFO L93 Difference]: Finished difference Result 365 states and 876 transitions. [2022-02-10 03:04:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:04:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:14,266 INFO L225 Difference]: With dead ends: 365 [2022-02-10 03:04:14,266 INFO L226 Difference]: Without dead ends: 355 [2022-02-10 03:04:14,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:14,267 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:14,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 151 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:04:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-02-10 03:04:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 313. [2022-02-10 03:04:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.4583333333333335) internal successors, (767), 312 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 767 transitions. [2022-02-10 03:04:14,272 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 767 transitions. Word has length 24 [2022-02-10 03:04:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:14,272 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 767 transitions. [2022-02-10 03:04:14,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 767 transitions. [2022-02-10 03:04:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:14,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:14,273 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:14,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:14,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-10 03:04:14,479 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:14,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1739796351, now seen corresponding path program 40 times [2022-02-10 03:04:14,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:14,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329558647] [2022-02-10 03:04:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:14,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:14,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:14,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329558647] [2022-02-10 03:04:14,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329558647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:14,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514768292] [2022-02-10 03:04:14,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:04:14,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:14,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:14,614 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:14,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-10 03:04:14,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:04:14,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:14,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:04:14,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:04:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:14,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:15,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:15,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-10 03:04:15,339 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:15,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:04:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:15,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514768292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:15,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:15,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:04:15,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442805595] [2022-02-10 03:04:15,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:15,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:04:15,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:15,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:04:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:04:15,345 INFO L87 Difference]: Start difference. First operand 313 states and 767 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:15,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:15,807 INFO L93 Difference]: Finished difference Result 462 states and 1107 transitions. [2022-02-10 03:04:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:04:15,807 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:15,808 INFO L225 Difference]: With dead ends: 462 [2022-02-10 03:04:15,809 INFO L226 Difference]: Without dead ends: 457 [2022-02-10 03:04:15,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:04:15,809 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 157 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:15,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 118 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:04:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-02-10 03:04:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 327. [2022-02-10 03:04:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.441717791411043) internal successors, (796), 326 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 796 transitions. [2022-02-10 03:04:15,815 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 796 transitions. Word has length 24 [2022-02-10 03:04:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:15,815 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 796 transitions. [2022-02-10 03:04:15,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 796 transitions. [2022-02-10 03:04:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:15,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:15,816 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:15,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-10 03:04:16,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-10 03:04:16,019 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash 483893735, now seen corresponding path program 41 times [2022-02-10 03:04:16,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:16,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818269927] [2022-02-10 03:04:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:16,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:16,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:16,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818269927] [2022-02-10 03:04:16,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818269927] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:16,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960258605] [2022-02-10 03:04:16,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:04:16,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:16,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:16,252 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:16,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-10 03:04:16,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:04:16,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:16,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:16,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:16,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:16,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:16,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:04:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:16,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:17,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:17,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:04:17,671 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:17,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:04:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:17,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960258605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:17,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:17,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:04:17,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087404255] [2022-02-10 03:04:17,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:17,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:04:17,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:04:17,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:17,678 INFO L87 Difference]: Start difference. First operand 327 states and 796 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:17,810 INFO L93 Difference]: Finished difference Result 375 states and 906 transitions. [2022-02-10 03:04:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:04:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:17,812 INFO L225 Difference]: With dead ends: 375 [2022-02-10 03:04:17,812 INFO L226 Difference]: Without dead ends: 370 [2022-02-10 03:04:17,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:04:17,813 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:17,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 101 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 212 Invalid, 0 Unknown, 176 Unchecked, 0.1s Time] [2022-02-10 03:04:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-10 03:04:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 329. [2022-02-10 03:04:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.4390243902439024) internal successors, (800), 328 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 800 transitions. [2022-02-10 03:04:17,818 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 800 transitions. Word has length 24 [2022-02-10 03:04:17,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:17,818 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 800 transitions. [2022-02-10 03:04:17,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 800 transitions. [2022-02-10 03:04:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:17,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:17,819 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:17,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:18,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:18,031 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash 188632005, now seen corresponding path program 42 times [2022-02-10 03:04:18,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:18,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556280828] [2022-02-10 03:04:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:18,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:18,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:18,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556280828] [2022-02-10 03:04:18,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556280828] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:18,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168243583] [2022-02-10 03:04:18,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:04:18,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:18,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:18,315 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:18,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-10 03:04:18,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:04:18,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:18,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:18,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:18,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:18,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:18,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:18,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:04:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:18,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:19,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:19,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:04:19,835 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:19,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:04:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:19,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168243583] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:19,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:19,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:04:19,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545984506] [2022-02-10 03:04:19,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:19,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:04:19,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:19,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:04:19,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:04:19,844 INFO L87 Difference]: Start difference. First operand 329 states and 800 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:20,029 INFO L93 Difference]: Finished difference Result 363 states and 881 transitions. [2022-02-10 03:04:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:04:20,029 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:20,030 INFO L225 Difference]: With dead ends: 363 [2022-02-10 03:04:20,031 INFO L226 Difference]: Without dead ends: 358 [2022-02-10 03:04:20,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:04:20,031 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:20,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 130 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 353 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-02-10 03:04:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-10 03:04:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 328. [2022-02-10 03:04:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.437308868501529) internal successors, (797), 327 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 797 transitions. [2022-02-10 03:04:20,037 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 797 transitions. Word has length 24 [2022-02-10 03:04:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:20,037 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 797 transitions. [2022-02-10 03:04:20,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 797 transitions. [2022-02-10 03:04:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:20,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:20,038 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:20,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-10 03:04:20,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-10 03:04:20,251 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash -965515839, now seen corresponding path program 43 times [2022-02-10 03:04:20,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:20,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032051608] [2022-02-10 03:04:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:20,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:20,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:20,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032051608] [2022-02-10 03:04:20,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032051608] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:20,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970446667] [2022-02-10 03:04:20,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:04:20,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:20,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:20,480 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:20,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-10 03:04:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:20,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:04:20,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:20,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:20,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:04:20,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-10 03:04:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:20,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:21,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:21,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-10 03:04:21,437 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:21,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-10 03:04:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:21,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970446667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:21,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:21,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-10 03:04:21,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012103381] [2022-02-10 03:04:21,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:21,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:04:21,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:21,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:04:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:04:21,443 INFO L87 Difference]: Start difference. First operand 328 states and 797 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:22,734 INFO L93 Difference]: Finished difference Result 882 states and 1996 transitions. [2022-02-10 03:04:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:04:22,739 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:22,742 INFO L225 Difference]: With dead ends: 882 [2022-02-10 03:04:22,742 INFO L226 Difference]: Without dead ends: 854 [2022-02-10 03:04:22,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=343, Invalid=1637, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:04:22,743 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 283 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:22,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 222 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:04:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-02-10 03:04:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 336. [2022-02-10 03:04:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4507462686567165) internal successors, (821), 335 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 821 transitions. [2022-02-10 03:04:22,751 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 821 transitions. Word has length 24 [2022-02-10 03:04:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:22,751 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 821 transitions. [2022-02-10 03:04:22,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 821 transitions. [2022-02-10 03:04:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:22,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:22,752 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:22,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:22,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:22,952 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:22,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1549629505, now seen corresponding path program 44 times [2022-02-10 03:04:22,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:22,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602111352] [2022-02-10 03:04:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:22,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:23,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:23,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602111352] [2022-02-10 03:04:23,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602111352] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:23,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561877729] [2022-02-10 03:04:23,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:04:23,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:23,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:23,154 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:23,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-10 03:04:23,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:04:23,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:23,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:23,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:23,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:04:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:23,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:24,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:24,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-10 03:04:24,126 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:04:24,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:04:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:24,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561877729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:24,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:24,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:24,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790352943] [2022-02-10 03:04:24,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:24,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:24,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:24,133 INFO L87 Difference]: Start difference. First operand 336 states and 821 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:25,562 INFO L93 Difference]: Finished difference Result 528 states and 1256 transitions. [2022-02-10 03:04:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:04:25,562 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:25,564 INFO L225 Difference]: With dead ends: 528 [2022-02-10 03:04:25,564 INFO L226 Difference]: Without dead ends: 523 [2022-02-10 03:04:25,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:04:25,565 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 117 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:25,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 202 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:04:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-10 03:04:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 338. [2022-02-10 03:04:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.4421364985163203) internal successors, (823), 337 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 823 transitions. [2022-02-10 03:04:25,571 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 823 transitions. Word has length 24 [2022-02-10 03:04:25,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:25,571 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 823 transitions. [2022-02-10 03:04:25,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 823 transitions. [2022-02-10 03:04:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:25,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:25,572 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:25,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:25,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-10 03:04:25,783 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1114529219, now seen corresponding path program 45 times [2022-02-10 03:04:25,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:25,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091774712] [2022-02-10 03:04:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:25,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:26,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:26,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091774712] [2022-02-10 03:04:26,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091774712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:26,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831048333] [2022-02-10 03:04:26,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:04:26,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:26,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:26,060 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:26,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-10 03:04:26,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:04:26,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:26,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:04:26,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:26,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:26,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:26,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:26,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:04:26,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:26,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:04:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:26,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:27,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:27,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-10 03:04:27,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:27,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-02-10 03:04:27,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:27,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-02-10 03:04:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:27,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831048333] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:27,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:27,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:27,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594456707] [2022-02-10 03:04:27,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:27,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:27,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:27,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:27,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:27,384 INFO L87 Difference]: Start difference. First operand 338 states and 823 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:28,330 INFO L93 Difference]: Finished difference Result 431 states and 1010 transitions. [2022-02-10 03:04:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:04:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:28,332 INFO L225 Difference]: With dead ends: 431 [2022-02-10 03:04:28,332 INFO L226 Difference]: Without dead ends: 403 [2022-02-10 03:04:28,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:04:28,332 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:28,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 134 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 412 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-02-10 03:04:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-02-10 03:04:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 343. [2022-02-10 03:04:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.4444444444444446) internal successors, (836), 342 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 836 transitions. [2022-02-10 03:04:28,337 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 836 transitions. Word has length 24 [2022-02-10 03:04:28,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:28,337 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 836 transitions. [2022-02-10 03:04:28,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 836 transitions. [2022-02-10 03:04:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:28,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:28,338 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:28,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-10 03:04:28,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:28,539 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:28,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1409790949, now seen corresponding path program 46 times [2022-02-10 03:04:28,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:28,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423744860] [2022-02-10 03:04:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:28,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:28,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:28,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423744860] [2022-02-10 03:04:28,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423744860] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:28,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128677651] [2022-02-10 03:04:28,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:04:28,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:28,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:28,816 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:28,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-10 03:04:28,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:04:28,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:28,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:04:28,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:28,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:28,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:29,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:29,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:04:29,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:29,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:04:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:29,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:30,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:30,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:04:30,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:30,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 97 [2022-02-10 03:04:30,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:30,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 77 [2022-02-10 03:04:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:30,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128677651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:30,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:30,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:30,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803096952] [2022-02-10 03:04:30,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:30,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:30,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:30,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:30,318 INFO L87 Difference]: Start difference. First operand 343 states and 836 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:31,853 INFO L93 Difference]: Finished difference Result 507 states and 1142 transitions. [2022-02-10 03:04:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:04:31,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:31,856 INFO L225 Difference]: With dead ends: 507 [2022-02-10 03:04:31,856 INFO L226 Difference]: Without dead ends: 469 [2022-02-10 03:04:31,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:04:31,857 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 102 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:31,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 233 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 814 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2022-02-10 03:04:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-02-10 03:04:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 340. [2022-02-10 03:04:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.43952802359882) internal successors, (827), 339 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 827 transitions. [2022-02-10 03:04:31,864 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 827 transitions. Word has length 24 [2022-02-10 03:04:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:31,864 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 827 transitions. [2022-02-10 03:04:31,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 827 transitions. [2022-02-10 03:04:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:31,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:31,865 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:31,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:32,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:32,079 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash -680506171, now seen corresponding path program 47 times [2022-02-10 03:04:32,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:32,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411741960] [2022-02-10 03:04:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:32,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:32,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:32,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411741960] [2022-02-10 03:04:32,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411741960] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:32,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356945774] [2022-02-10 03:04:32,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:04:32,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:32,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:32,451 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:32,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-10 03:04:32,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:04:32,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:32,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:32,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:32,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:32,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:04:32,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:32,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:04:32,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:32,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:04:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:32,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:33,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:33,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-02-10 03:04:33,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:33,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-02-10 03:04:33,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:33,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-10 03:04:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:33,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356945774] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:33,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:33,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:33,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501472906] [2022-02-10 03:04:33,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:33,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:33,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:33,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:33,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:33,892 INFO L87 Difference]: Start difference. First operand 340 states and 827 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:34,219 INFO L93 Difference]: Finished difference Result 364 states and 878 transitions. [2022-02-10 03:04:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:04:34,219 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:34,220 INFO L225 Difference]: With dead ends: 364 [2022-02-10 03:04:34,220 INFO L226 Difference]: Without dead ends: 359 [2022-02-10 03:04:34,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:04:34,220 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:34,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 99 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 449 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-02-10 03:04:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-02-10 03:04:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 340. [2022-02-10 03:04:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.43952802359882) internal successors, (827), 339 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 827 transitions. [2022-02-10 03:04:34,224 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 827 transitions. Word has length 24 [2022-02-10 03:04:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:34,224 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 827 transitions. [2022-02-10 03:04:34,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 827 transitions. [2022-02-10 03:04:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:34,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:34,225 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:34,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:34,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-10 03:04:34,426 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1104429509, now seen corresponding path program 48 times [2022-02-10 03:04:34,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:34,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733923462] [2022-02-10 03:04:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:34,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:34,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:34,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733923462] [2022-02-10 03:04:34,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733923462] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:34,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710916561] [2022-02-10 03:04:34,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:04:34,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:34,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:34,640 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:34,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-10 03:04:34,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:04:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:04:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:34,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:34,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:34,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:04:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:35,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:35,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:35,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-02-10 03:04:35,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:35,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-02-10 03:04:35,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:35,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-02-10 03:04:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:35,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710916561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:35,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:35,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:04:35,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914142418] [2022-02-10 03:04:35,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:35,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:04:35,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:04:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:04:35,683 INFO L87 Difference]: Start difference. First operand 340 states and 827 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:36,381 INFO L93 Difference]: Finished difference Result 655 states and 1456 transitions. [2022-02-10 03:04:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:04:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:36,382 INFO L225 Difference]: With dead ends: 655 [2022-02-10 03:04:36,382 INFO L226 Difference]: Without dead ends: 627 [2022-02-10 03:04:36,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:04:36,383 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 158 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:36,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 224 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 543 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2022-02-10 03:04:36,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-02-10 03:04:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 348. [2022-02-10 03:04:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.478386167146974) internal successors, (860), 347 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 860 transitions. [2022-02-10 03:04:36,388 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 860 transitions. Word has length 24 [2022-02-10 03:04:36,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:36,388 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 860 transitions. [2022-02-10 03:04:36,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:36,388 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 860 transitions. [2022-02-10 03:04:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:36,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:36,389 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:36,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-02-10 03:04:36,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-10 03:04:36,589 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash -675392443, now seen corresponding path program 49 times [2022-02-10 03:04:36,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:36,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842642845] [2022-02-10 03:04:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:36,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:36,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:36,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842642845] [2022-02-10 03:04:36,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842642845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:36,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509218409] [2022-02-10 03:04:36,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:04:36,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:36,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:36,860 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:36,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-10 03:04:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:36,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:36,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:36,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:36,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:37,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:37,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:04:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:37,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:37,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:37,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-10 03:04:37,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:37,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-10 03:04:37,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:37,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-10 03:04:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:38,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509218409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:38,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:38,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:38,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132297638] [2022-02-10 03:04:38,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:38,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:38,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:38,038 INFO L87 Difference]: Start difference. First operand 348 states and 860 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:38,208 INFO L93 Difference]: Finished difference Result 398 states and 960 transitions. [2022-02-10 03:04:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:04:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:38,210 INFO L225 Difference]: With dead ends: 398 [2022-02-10 03:04:38,210 INFO L226 Difference]: Without dead ends: 393 [2022-02-10 03:04:38,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:38,210 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:38,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 111 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 370 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-02-10 03:04:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-02-10 03:04:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 348. [2022-02-10 03:04:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.478386167146974) internal successors, (860), 347 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 860 transitions. [2022-02-10 03:04:38,214 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 860 transitions. Word has length 24 [2022-02-10 03:04:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:38,215 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 860 transitions. [2022-02-10 03:04:38,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 860 transitions. [2022-02-10 03:04:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:38,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:38,215 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:38,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:38,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-10 03:04:38,416 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash 802567309, now seen corresponding path program 50 times [2022-02-10 03:04:38,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:38,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652796453] [2022-02-10 03:04:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:38,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:38,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:38,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652796453] [2022-02-10 03:04:38,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652796453] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:38,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206339284] [2022-02-10 03:04:38,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:04:38,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:38,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:38,683 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:38,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-10 03:04:38,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:04:38,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:38,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:38,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:04:38,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:38,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-02-10 03:04:38,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:38,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-02-10 03:04:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:39,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:39,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:39,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:04:39,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:39,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-10 03:04:39,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:39,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-10 03:04:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:39,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206339284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:39,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:39,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:39,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500024148] [2022-02-10 03:04:39,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:39,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:39,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:39,845 INFO L87 Difference]: Start difference. First operand 348 states and 860 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:40,257 INFO L93 Difference]: Finished difference Result 385 states and 934 transitions. [2022-02-10 03:04:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:04:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:40,258 INFO L225 Difference]: With dead ends: 385 [2022-02-10 03:04:40,258 INFO L226 Difference]: Without dead ends: 380 [2022-02-10 03:04:40,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:04:40,258 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:40,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 87 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 466 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-02-10 03:04:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-10 03:04:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 350. [2022-02-10 03:04:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.469914040114613) internal successors, (862), 349 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 862 transitions. [2022-02-10 03:04:40,263 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 862 transitions. Word has length 24 [2022-02-10 03:04:40,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:40,263 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 862 transitions. [2022-02-10 03:04:40,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 862 transitions. [2022-02-10 03:04:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:40,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:40,264 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:40,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:40,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-02-10 03:04:40,465 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:40,466 INFO L85 PathProgramCache]: Analyzing trace with hash 556385205, now seen corresponding path program 51 times [2022-02-10 03:04:40,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:40,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698291780] [2022-02-10 03:04:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:40,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:40,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:40,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698291780] [2022-02-10 03:04:40,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698291780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:40,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095827494] [2022-02-10 03:04:40,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:04:40,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:40,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:40,731 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:40,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-10 03:04:40,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:04:40,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:04:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:40,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:40,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:41,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:41,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:04:41,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:41,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:04:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:41,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:41,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:41,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-10 03:04:41,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:41,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 97 [2022-02-10 03:04:41,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:41,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 77 [2022-02-10 03:04:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:42,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095827494] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:42,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:42,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:42,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660990567] [2022-02-10 03:04:42,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:42,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:42,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:42,056 INFO L87 Difference]: Start difference. First operand 350 states and 862 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:42,927 INFO L93 Difference]: Finished difference Result 466 states and 1095 transitions. [2022-02-10 03:04:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:04:42,928 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:42,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:42,929 INFO L225 Difference]: With dead ends: 466 [2022-02-10 03:04:42,929 INFO L226 Difference]: Without dead ends: 438 [2022-02-10 03:04:42,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:04:42,929 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:42,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 180 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 536 Invalid, 0 Unknown, 228 Unchecked, 0.2s Time] [2022-02-10 03:04:42,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-02-10 03:04:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 354. [2022-02-10 03:04:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.4674220963172804) internal successors, (871), 353 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 871 transitions. [2022-02-10 03:04:42,934 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 871 transitions. Word has length 24 [2022-02-10 03:04:42,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:42,934 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 871 transitions. [2022-02-10 03:04:42,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 871 transitions. [2022-02-10 03:04:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:42,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:42,934 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:42,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:43,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-10 03:04:43,135 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 261123475, now seen corresponding path program 52 times [2022-02-10 03:04:43,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:43,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853116695] [2022-02-10 03:04:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:43,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:43,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:43,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853116695] [2022-02-10 03:04:43,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853116695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:43,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553601663] [2022-02-10 03:04:43,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:04:43,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:43,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:43,400 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:43,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-10 03:04:43,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:04:43,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:43,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:04:43,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:43,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:43,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:43,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:43,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:04:43,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:43,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:04:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:43,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:44,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:44,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:04:44,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:44,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 101 [2022-02-10 03:04:44,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:44,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 81 [2022-02-10 03:04:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:44,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553601663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:44,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:44,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:44,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905142559] [2022-02-10 03:04:44,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:44,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:44,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:44,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:44,925 INFO L87 Difference]: Start difference. First operand 354 states and 871 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:46,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:46,387 INFO L93 Difference]: Finished difference Result 548 states and 1243 transitions. [2022-02-10 03:04:46,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:04:46,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:46,388 INFO L225 Difference]: With dead ends: 548 [2022-02-10 03:04:46,388 INFO L226 Difference]: Without dead ends: 510 [2022-02-10 03:04:46,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:04:46,389 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:46,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 226 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 757 Invalid, 0 Unknown, 6 Unchecked, 0.4s Time] [2022-02-10 03:04:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-02-10 03:04:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 353. [2022-02-10 03:04:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.465909090909091) internal successors, (868), 352 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 868 transitions. [2022-02-10 03:04:46,393 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 868 transitions. Word has length 24 [2022-02-10 03:04:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:46,394 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 868 transitions. [2022-02-10 03:04:46,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 868 transitions. [2022-02-10 03:04:46,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:46,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:46,394 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:46,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:46,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-10 03:04:46,595 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:46,595 INFO L85 PathProgramCache]: Analyzing trace with hash 990408253, now seen corresponding path program 53 times [2022-02-10 03:04:46,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:46,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000183234] [2022-02-10 03:04:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:46,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:46,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:46,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000183234] [2022-02-10 03:04:46,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000183234] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:46,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384537277] [2022-02-10 03:04:46,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:04:46,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:46,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:46,912 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:46,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-10 03:04:46,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:04:46,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:47,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:47,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:04:47,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:47,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:04:47,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:47,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:04:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:47,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:48,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:48,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-02-10 03:04:48,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:48,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-02-10 03:04:48,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:48,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-10 03:04:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:48,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384537277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:48,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:48,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:04:48,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109108292] [2022-02-10 03:04:48,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:48,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:04:48,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:04:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:04:48,431 INFO L87 Difference]: Start difference. First operand 353 states and 868 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:48,877 INFO L93 Difference]: Finished difference Result 413 states and 1006 transitions. [2022-02-10 03:04:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:04:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:48,878 INFO L225 Difference]: With dead ends: 413 [2022-02-10 03:04:48,878 INFO L226 Difference]: Without dead ends: 408 [2022-02-10 03:04:48,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:04:48,879 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:48,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 126 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 492 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-02-10 03:04:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-02-10 03:04:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 352. [2022-02-10 03:04:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.4643874643874644) internal successors, (865), 351 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 865 transitions. [2022-02-10 03:04:48,884 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 865 transitions. Word has length 24 [2022-02-10 03:04:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:48,884 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 865 transitions. [2022-02-10 03:04:48,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 865 transitions. [2022-02-10 03:04:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:48,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:48,885 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:48,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-10 03:04:49,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:49,099 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash 234987175, now seen corresponding path program 54 times [2022-02-10 03:04:49,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:49,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518193000] [2022-02-10 03:04:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:49,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:49,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:49,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518193000] [2022-02-10 03:04:49,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518193000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:49,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440342572] [2022-02-10 03:04:49,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:04:49,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:49,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:49,332 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:49,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-10 03:04:49,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:04:49,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:49,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:49,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:49,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:49,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:49,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:04:49,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:49,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:04:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:49,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:50,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:50,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-10 03:04:50,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:50,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:04:50,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:50,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:04:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:50,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440342572] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:50,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:50,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:04:50,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246245531] [2022-02-10 03:04:50,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:50,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:04:50,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:50,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:04:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:04:50,441 INFO L87 Difference]: Start difference. First operand 352 states and 865 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:51,100 INFO L93 Difference]: Finished difference Result 440 states and 1065 transitions. [2022-02-10 03:04:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:04:51,100 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:51,101 INFO L225 Difference]: With dead ends: 440 [2022-02-10 03:04:51,101 INFO L226 Difference]: Without dead ends: 430 [2022-02-10 03:04:51,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:04:51,102 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:51,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 106 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 380 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-02-10 03:04:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-02-10 03:04:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 361. [2022-02-10 03:04:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.4805555555555556) internal successors, (893), 360 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 893 transitions. [2022-02-10 03:04:51,107 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 893 transitions. Word has length 24 [2022-02-10 03:04:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:51,107 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 893 transitions. [2022-02-10 03:04:51,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 893 transitions. [2022-02-10 03:04:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:51,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:51,108 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:51,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:51,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:51,309 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash -60274555, now seen corresponding path program 55 times [2022-02-10 03:04:51,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:51,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118039739] [2022-02-10 03:04:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:51,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:51,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:51,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118039739] [2022-02-10 03:04:51,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118039739] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:51,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137142585] [2022-02-10 03:04:51,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:04:51,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:51,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:51,571 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:51,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-10 03:04:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:04:51,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:51,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:51,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:51,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:51,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:04:51,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:51,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:04:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:52,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:52,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:52,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-10 03:04:52,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:52,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-02-10 03:04:53,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:53,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2022-02-10 03:04:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:53,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137142585] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:53,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:53,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:53,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899052409] [2022-02-10 03:04:53,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:53,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:53,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:53,055 INFO L87 Difference]: Start difference. First operand 361 states and 893 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:54,234 INFO L93 Difference]: Finished difference Result 556 states and 1260 transitions. [2022-02-10 03:04:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:04:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:54,236 INFO L225 Difference]: With dead ends: 556 [2022-02-10 03:04:54,236 INFO L226 Difference]: Without dead ends: 523 [2022-02-10 03:04:54,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:04:54,236 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 135 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:54,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 151 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 562 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2022-02-10 03:04:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-10 03:04:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 357. [2022-02-10 03:04:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.4747191011235956) internal successors, (881), 356 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 881 transitions. [2022-02-10 03:04:54,242 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 881 transitions. Word has length 24 [2022-02-10 03:04:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:54,242 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 881 transitions. [2022-02-10 03:04:54,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 881 transitions. [2022-02-10 03:04:54,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:54,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:54,243 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:54,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:54,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:54,444 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:54,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1082023877, now seen corresponding path program 56 times [2022-02-10 03:04:54,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:54,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605941768] [2022-02-10 03:04:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:54,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:54,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:54,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605941768] [2022-02-10 03:04:54,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605941768] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:54,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676073165] [2022-02-10 03:04:54,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:04:54,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:54,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:54,668 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:54,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-10 03:04:54,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:04:54,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:54,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:54,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:54,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:54,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:04:54,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:54,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:04:54,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:54,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:04:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:55,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:55,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:55,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-10 03:04:55,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:55,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:04:55,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:55,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:04:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:55,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676073165] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:55,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:55,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:55,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618190193] [2022-02-10 03:04:55,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:55,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:55,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:55,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:55,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:55,605 INFO L87 Difference]: Start difference. First operand 357 states and 881 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:56,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:56,135 INFO L93 Difference]: Finished difference Result 450 states and 1068 transitions. [2022-02-10 03:04:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:04:56,135 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:56,136 INFO L225 Difference]: With dead ends: 450 [2022-02-10 03:04:56,136 INFO L226 Difference]: Without dead ends: 435 [2022-02-10 03:04:56,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:04:56,137 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:56,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 167 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 584 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2022-02-10 03:04:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-02-10 03:04:56,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 364. [2022-02-10 03:04:56,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.4738292011019283) internal successors, (898), 363 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 898 transitions. [2022-02-10 03:04:56,142 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 898 transitions. Word has length 24 [2022-02-10 03:04:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:56,142 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 898 transitions. [2022-02-10 03:04:56,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 898 transitions. [2022-02-10 03:04:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:56,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:56,143 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:56,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:56,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:56,344 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1489930305, now seen corresponding path program 57 times [2022-02-10 03:04:56,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:56,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745278624] [2022-02-10 03:04:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:56,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:56,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:56,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745278624] [2022-02-10 03:04:56,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745278624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:56,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223687309] [2022-02-10 03:04:56,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:04:56,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:56,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:56,516 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:56,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-10 03:04:56,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:04:56,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:56,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:56,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:04:56,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:04:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:56,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:57,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:57,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-02-10 03:04:57,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:57,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:04:57,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:57,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:04:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:57,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223687309] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:57,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:57,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:04:57,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557244723] [2022-02-10 03:04:57,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:57,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:04:57,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:57,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:04:57,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:04:57,304 INFO L87 Difference]: Start difference. First operand 364 states and 898 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:57,492 INFO L93 Difference]: Finished difference Result 419 states and 1009 transitions. [2022-02-10 03:04:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:04:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:57,494 INFO L225 Difference]: With dead ends: 419 [2022-02-10 03:04:57,494 INFO L226 Difference]: Without dead ends: 414 [2022-02-10 03:04:57,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:04:57,494 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:57,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 94 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:04:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-02-10 03:04:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 364. [2022-02-10 03:04:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.4738292011019283) internal successors, (898), 363 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 898 transitions. [2022-02-10 03:04:57,499 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 898 transitions. Word has length 24 [2022-02-10 03:04:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:57,499 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 898 transitions. [2022-02-10 03:04:57,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 898 transitions. [2022-02-10 03:04:57,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:57,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:57,500 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:57,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-10 03:04:57,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-10 03:04:57,711 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:57,712 INFO L85 PathProgramCache]: Analyzing trace with hash 926751267, now seen corresponding path program 58 times [2022-02-10 03:04:57,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:57,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380678429] [2022-02-10 03:04:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:57,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:57,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:57,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380678429] [2022-02-10 03:04:57,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380678429] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:57,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978764194] [2022-02-10 03:04:57,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:04:57,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:57,917 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:57,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-10 03:04:57,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:04:57,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:57,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:58,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:58,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:04:58,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:58,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:04:58,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:04:58,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-10 03:04:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:58,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:59,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:59,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:04:59,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:59,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:04:59,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:59,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:04:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:04:59,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978764194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:59,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:59,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:04:59,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136182632] [2022-02-10 03:04:59,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:59,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:04:59,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:59,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:04:59,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:04:59,217 INFO L87 Difference]: Start difference. First operand 364 states and 898 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:59,429 INFO L93 Difference]: Finished difference Result 434 states and 1047 transitions. [2022-02-10 03:04:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:04:59,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:04:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:59,430 INFO L225 Difference]: With dead ends: 434 [2022-02-10 03:04:59,430 INFO L226 Difference]: Without dead ends: 429 [2022-02-10 03:04:59,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:04:59,431 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:59,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 110 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 223 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-02-10 03:04:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-02-10 03:04:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 369. [2022-02-10 03:04:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.4972826086956523) internal successors, (919), 368 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 919 transitions. [2022-02-10 03:04:59,436 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 919 transitions. Word has length 24 [2022-02-10 03:04:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:59,436 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 919 transitions. [2022-02-10 03:04:59,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 919 transitions. [2022-02-10 03:04:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:04:59,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:59,437 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:59,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-10 03:04:59,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-10 03:04:59,638 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:04:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1671550801, now seen corresponding path program 59 times [2022-02-10 03:04:59,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:59,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176259765] [2022-02-10 03:04:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:59,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:04:59,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:59,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176259765] [2022-02-10 03:04:59,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176259765] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:59,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799612407] [2022-02-10 03:04:59,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:04:59,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:59,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:59,878 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:59,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-10 03:04:59,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:04:59,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:59,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:04:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:00,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:00,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:00,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:00,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-10 03:05:00,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:00,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-02-10 03:05:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:00,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:00,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:00,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:05:01,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:01,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:05:01,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:01,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-02-10 03:05:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:01,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799612407] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:01,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:01,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:01,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496011710] [2022-02-10 03:05:01,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:01,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:01,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:01,151 INFO L87 Difference]: Start difference. First operand 369 states and 919 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:01,360 INFO L93 Difference]: Finished difference Result 441 states and 1061 transitions. [2022-02-10 03:05:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:05:01,361 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:01,362 INFO L225 Difference]: With dead ends: 441 [2022-02-10 03:05:01,362 INFO L226 Difference]: Without dead ends: 436 [2022-02-10 03:05:01,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:01,362 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:01,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 137 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 416 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-02-10 03:05:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-02-10 03:05:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 365. [2022-02-10 03:05:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.478021978021978) internal successors, (902), 364 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 902 transitions. [2022-02-10 03:05:01,368 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 902 transitions. Word has length 24 [2022-02-10 03:05:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:01,369 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 902 transitions. [2022-02-10 03:05:01,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 902 transitions. [2022-02-10 03:05:01,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:01,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:01,369 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:01,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-10 03:05:01,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:01,570 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:01,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash 173404481, now seen corresponding path program 60 times [2022-02-10 03:05:01,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:01,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846293001] [2022-02-10 03:05:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:01,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:01,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:01,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846293001] [2022-02-10 03:05:01,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846293001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:01,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047865889] [2022-02-10 03:05:01,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:01,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:01,793 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:01,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-10 03:05:01,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:05:01,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:01,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:01,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:01,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:01,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:02,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:02,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-02-10 03:05:02,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:02,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-02-10 03:05:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:02,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:02,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:02,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:05:03,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:03,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:05:03,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:03,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:05:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:03,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047865889] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:03,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:03,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:03,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588317029] [2022-02-10 03:05:03,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:03,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:03,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:03,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:03,056 INFO L87 Difference]: Start difference. First operand 365 states and 902 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:03,536 INFO L93 Difference]: Finished difference Result 435 states and 1041 transitions. [2022-02-10 03:05:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:05:03,537 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:03,538 INFO L225 Difference]: With dead ends: 435 [2022-02-10 03:05:03,538 INFO L226 Difference]: Without dead ends: 430 [2022-02-10 03:05:03,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:05:03,538 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:03,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 153 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 461 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-02-10 03:05:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-02-10 03:05:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 364. [2022-02-10 03:05:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.4738292011019283) internal successors, (898), 363 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 898 transitions. [2022-02-10 03:05:03,542 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 898 transitions. Word has length 24 [2022-02-10 03:05:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:03,543 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 898 transitions. [2022-02-10 03:05:03,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 898 transitions. [2022-02-10 03:05:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:03,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:03,543 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:03,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-10 03:05:03,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:03,747 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1366171333, now seen corresponding path program 61 times [2022-02-10 03:05:03,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:03,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496746711] [2022-02-10 03:05:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:03,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:03,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:03,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496746711] [2022-02-10 03:05:03,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496746711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:03,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079837284] [2022-02-10 03:05:03,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:03,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:03,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:03,984 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:03,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-10 03:05:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:04,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:04,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:04,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:04,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:05:04,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:04,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:05:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:04,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:05,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:05,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-02-10 03:05:05,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:05,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-02-10 03:05:05,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:05,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-02-10 03:05:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:05,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079837284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:05,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:05,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:05,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635702534] [2022-02-10 03:05:05,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:05,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:05,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:05,432 INFO L87 Difference]: Start difference. First operand 364 states and 898 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:05,598 INFO L93 Difference]: Finished difference Result 417 states and 1013 transitions. [2022-02-10 03:05:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:05:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:05,599 INFO L225 Difference]: With dead ends: 417 [2022-02-10 03:05:05,599 INFO L226 Difference]: Without dead ends: 412 [2022-02-10 03:05:05,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:05,599 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:05,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 104 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 346 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-02-10 03:05:05,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-02-10 03:05:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 367. [2022-02-10 03:05:05,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.4726775956284155) internal successors, (905), 366 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 905 transitions. [2022-02-10 03:05:05,606 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 905 transitions. Word has length 24 [2022-02-10 03:05:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:05,606 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 905 transitions. [2022-02-10 03:05:05,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 905 transitions. [2022-02-10 03:05:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:05,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:05,607 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:05,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:05,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-10 03:05:05,823 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1070909603, now seen corresponding path program 62 times [2022-02-10 03:05:05,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:05,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324557449] [2022-02-10 03:05:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:05,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:06,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:06,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324557449] [2022-02-10 03:05:06,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324557449] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:06,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209019404] [2022-02-10 03:05:06,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:05:06,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:06,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:06,089 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:06,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-10 03:05:06,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:05:06,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:06,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:06,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:06,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:06,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:05:06,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:06,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:05:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:06,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:07,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:07,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-10 03:05:07,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:07,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 68 [2022-02-10 03:05:07,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:07,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2022-02-10 03:05:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:07,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209019404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:07,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:07,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:07,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399956679] [2022-02-10 03:05:07,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:07,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:07,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:07,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:07,324 INFO L87 Difference]: Start difference. First operand 367 states and 905 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:07,658 INFO L93 Difference]: Finished difference Result 414 states and 1004 transitions. [2022-02-10 03:05:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:05:07,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:07,659 INFO L225 Difference]: With dead ends: 414 [2022-02-10 03:05:07,659 INFO L226 Difference]: Without dead ends: 409 [2022-02-10 03:05:07,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:05:07,659 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:07,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 124 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 532 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-02-10 03:05:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-10 03:05:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 365. [2022-02-10 03:05:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.46978021978022) internal successors, (899), 364 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 899 transitions. [2022-02-10 03:05:07,663 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 899 transitions. Word has length 24 [2022-02-10 03:05:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:07,664 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 899 transitions. [2022-02-10 03:05:07,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:07,664 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 899 transitions. [2022-02-10 03:05:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:07,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:07,664 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:07,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-10 03:05:07,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-10 03:05:07,865 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:07,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1800194381, now seen corresponding path program 63 times [2022-02-10 03:05:07,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:07,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130671259] [2022-02-10 03:05:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:07,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:08,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:08,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130671259] [2022-02-10 03:05:08,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130671259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:08,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356059290] [2022-02-10 03:05:08,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:05:08,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:08,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:08,183 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:08,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-10 03:05:08,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:05:08,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:08,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:08,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:05:08,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:08,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:05:08,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:08,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:05:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:08,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:09,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:09,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-02-10 03:05:09,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:09,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-02-10 03:05:09,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:09,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-10 03:05:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:09,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356059290] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:09,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:09,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:09,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212405565] [2022-02-10 03:05:09,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:09,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:09,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:09,528 INFO L87 Difference]: Start difference. First operand 365 states and 899 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:09,849 INFO L93 Difference]: Finished difference Result 414 states and 1005 transitions. [2022-02-10 03:05:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:05:09,849 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:09,850 INFO L225 Difference]: With dead ends: 414 [2022-02-10 03:05:09,850 INFO L226 Difference]: Without dead ends: 409 [2022-02-10 03:05:09,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:05:09,851 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:09,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 104 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 456 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-02-10 03:05:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-10 03:05:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 366. [2022-02-10 03:05:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.4712328767123286) internal successors, (902), 365 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 902 transitions. [2022-02-10 03:05:09,855 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 902 transitions. Word has length 24 [2022-02-10 03:05:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:09,855 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 902 transitions. [2022-02-10 03:05:09,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 902 transitions. [2022-02-10 03:05:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:09,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:09,856 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:09,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:10,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:10,056 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash -23430071, now seen corresponding path program 64 times [2022-02-10 03:05:10,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:10,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643747330] [2022-02-10 03:05:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:10,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:10,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:10,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643747330] [2022-02-10 03:05:10,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643747330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:10,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344920443] [2022-02-10 03:05:10,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:05:10,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:10,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:10,298 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:10,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-10 03:05:10,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:05:10,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:10,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:10,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:10,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:10,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:10,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:10,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:05:10,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:10,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:05:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:10,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:11,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:11,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:05:11,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:11,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:11,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:11,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:11,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344920443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:11,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:11,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:11,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066679761] [2022-02-10 03:05:11,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:11,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:11,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:11,721 INFO L87 Difference]: Start difference. First operand 366 states and 902 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:11,909 INFO L93 Difference]: Finished difference Result 416 states and 1024 transitions. [2022-02-10 03:05:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:05:11,910 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:11,911 INFO L225 Difference]: With dead ends: 416 [2022-02-10 03:05:11,911 INFO L226 Difference]: Without dead ends: 411 [2022-02-10 03:05:11,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:05:11,911 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:11,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 334 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2022-02-10 03:05:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-02-10 03:05:11,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 368. [2022-02-10 03:05:11,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.4686648501362396) internal successors, (906), 367 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 906 transitions. [2022-02-10 03:05:11,917 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 906 transitions. Word has length 24 [2022-02-10 03:05:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:11,917 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 906 transitions. [2022-02-10 03:05:11,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 906 transitions. [2022-02-10 03:05:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:11,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:11,918 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:11,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:12,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-02-10 03:05:12,123 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash -318691801, now seen corresponding path program 65 times [2022-02-10 03:05:12,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:12,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226763106] [2022-02-10 03:05:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:12,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:12,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:12,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226763106] [2022-02-10 03:05:12,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226763106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:12,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637774866] [2022-02-10 03:05:12,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:05:12,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:12,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:12,405 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:12,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-10 03:05:12,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:05:12,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:12,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:12,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:12,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:12,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:12,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:05:12,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:12,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:05:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:12,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:13,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:13,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:05:13,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:13,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:13,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:13,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:13,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637774866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:13,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:13,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:13,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095210298] [2022-02-10 03:05:13,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:13,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:13,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:13,749 INFO L87 Difference]: Start difference. First operand 368 states and 906 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:13,953 INFO L93 Difference]: Finished difference Result 413 states and 1015 transitions. [2022-02-10 03:05:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:05:13,953 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:13,954 INFO L225 Difference]: With dead ends: 413 [2022-02-10 03:05:13,954 INFO L226 Difference]: Without dead ends: 408 [2022-02-10 03:05:13,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:05:13,954 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:13,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 93 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 359 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2022-02-10 03:05:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-02-10 03:05:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2022-02-10 03:05:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.4712328767123286) internal successors, (902), 365 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 902 transitions. [2022-02-10 03:05:13,959 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 902 transitions. Word has length 24 [2022-02-10 03:05:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:13,959 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 902 transitions. [2022-02-10 03:05:13,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 902 transitions. [2022-02-10 03:05:13,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:13,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:13,960 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:13,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:14,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:14,160 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash -345350587, now seen corresponding path program 66 times [2022-02-10 03:05:14,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:14,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999360942] [2022-02-10 03:05:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:14,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:14,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:14,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999360942] [2022-02-10 03:05:14,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999360942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:14,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682955457] [2022-02-10 03:05:14,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:14,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:14,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:14,329 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:14,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-10 03:05:14,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:05:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:14,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:14,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:05:14,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:05:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:14,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:15,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:15,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-10 03:05:15,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:15,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:15,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:15,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:15,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682955457] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:15,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:15,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:05:15,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157386703] [2022-02-10 03:05:15,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:15,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:05:15,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:05:15,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:05:15,287 INFO L87 Difference]: Start difference. First operand 366 states and 902 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:15,578 INFO L93 Difference]: Finished difference Result 443 states and 1088 transitions. [2022-02-10 03:05:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:05:15,579 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:15,580 INFO L225 Difference]: With dead ends: 443 [2022-02-10 03:05:15,580 INFO L226 Difference]: Without dead ends: 438 [2022-02-10 03:05:15,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:15,580 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:15,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 95 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 421 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-02-10 03:05:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-02-10 03:05:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 376. [2022-02-10 03:05:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.458666666666667) internal successors, (922), 375 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 922 transitions. [2022-02-10 03:05:15,585 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 922 transitions. Word has length 24 [2022-02-10 03:05:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:15,585 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 922 transitions. [2022-02-10 03:05:15,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 922 transitions. [2022-02-10 03:05:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:15,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:15,586 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:15,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-02-10 03:05:15,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:15,786 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:15,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1194158651, now seen corresponding path program 67 times [2022-02-10 03:05:15,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:15,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354622809] [2022-02-10 03:05:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:15,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:15,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:15,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354622809] [2022-02-10 03:05:15,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354622809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:15,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838674480] [2022-02-10 03:05:15,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:15,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:15,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:15,947 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:15,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-10 03:05:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:16,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:05:16,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:05:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:16,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:16,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:16,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-10 03:05:16,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:16,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:16,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:16,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:16,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838674480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:16,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:16,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-10 03:05:16,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367207742] [2022-02-10 03:05:16,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:16,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:05:16,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:16,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:05:16,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:05:16,855 INFO L87 Difference]: Start difference. First operand 376 states and 922 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:17,343 INFO L93 Difference]: Finished difference Result 541 states and 1298 transitions. [2022-02-10 03:05:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:05:17,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:17,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:17,344 INFO L225 Difference]: With dead ends: 541 [2022-02-10 03:05:17,344 INFO L226 Difference]: Without dead ends: 536 [2022-02-10 03:05:17,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:05:17,345 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:17,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 156 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:05:17,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-02-10 03:05:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 376. [2022-02-10 03:05:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.458666666666667) internal successors, (922), 375 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 922 transitions. [2022-02-10 03:05:17,350 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 922 transitions. Word has length 24 [2022-02-10 03:05:17,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:17,350 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 922 transitions. [2022-02-10 03:05:17,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 922 transitions. [2022-02-10 03:05:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:17,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:17,350 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:17,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-10 03:05:17,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-10 03:05:17,551 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1472839645, now seen corresponding path program 68 times [2022-02-10 03:05:17,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:17,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140367014] [2022-02-10 03:05:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:17,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:17,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:17,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140367014] [2022-02-10 03:05:17,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140367014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:17,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088713877] [2022-02-10 03:05:17,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:05:17,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:17,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:17,749 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:17,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-10 03:05:17,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:05:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:17,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:17,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:17,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:18,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:05:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:18,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:18,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:18,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-10 03:05:18,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:18,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:18,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:18,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:18,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088713877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:18,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:18,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:05:18,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885369116] [2022-02-10 03:05:18,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:18,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:18,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:18,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:18,838 INFO L87 Difference]: Start difference. First operand 376 states and 922 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:19,134 INFO L93 Difference]: Finished difference Result 605 states and 1486 transitions. [2022-02-10 03:05:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:05:19,135 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:19,141 INFO L225 Difference]: With dead ends: 605 [2022-02-10 03:05:19,141 INFO L226 Difference]: Without dead ends: 600 [2022-02-10 03:05:19,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:19,142 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:19,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 148 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 419 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-02-10 03:05:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-02-10 03:05:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 376. [2022-02-10 03:05:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.458666666666667) internal successors, (922), 375 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 922 transitions. [2022-02-10 03:05:19,149 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 922 transitions. Word has length 24 [2022-02-10 03:05:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:19,149 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 922 transitions. [2022-02-10 03:05:19,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 922 transitions. [2022-02-10 03:05:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:19,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:19,150 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:19,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:19,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:19,372 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:19,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1042305699, now seen corresponding path program 69 times [2022-02-10 03:05:19,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:19,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97436192] [2022-02-10 03:05:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:19,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:19,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:19,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97436192] [2022-02-10 03:05:19,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97436192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:19,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71643377] [2022-02-10 03:05:19,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:05:19,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:19,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:19,556 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:19,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-10 03:05:19,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:05:19,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:19,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:05:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:19,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:19,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:19,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:19,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2022-02-10 03:05:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:20,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:20,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:20,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-10 03:05:20,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:20,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-10 03:05:20,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:20,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-10 03:05:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:20,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71643377] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:20,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:20,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:20,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216132357] [2022-02-10 03:05:20,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:20,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:20,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:20,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:20,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:20,770 INFO L87 Difference]: Start difference. First operand 376 states and 922 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:21,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:21,455 INFO L93 Difference]: Finished difference Result 538 states and 1259 transitions. [2022-02-10 03:05:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:05:21,455 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:21,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:21,457 INFO L225 Difference]: With dead ends: 538 [2022-02-10 03:05:21,457 INFO L226 Difference]: Without dead ends: 522 [2022-02-10 03:05:21,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:05:21,457 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:21,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 137 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 529 Invalid, 0 Unknown, 29 Unchecked, 0.3s Time] [2022-02-10 03:05:21,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-02-10 03:05:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 382. [2022-02-10 03:05:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.4461942257217846) internal successors, (932), 381 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 932 transitions. [2022-02-10 03:05:21,464 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 932 transitions. Word has length 24 [2022-02-10 03:05:21,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:21,464 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 932 transitions. [2022-02-10 03:05:21,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 932 transitions. [2022-02-10 03:05:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:21,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:21,465 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:21,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:21,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:21,665 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash -709837235, now seen corresponding path program 70 times [2022-02-10 03:05:21,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:21,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529905131] [2022-02-10 03:05:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:21,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:21,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:21,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529905131] [2022-02-10 03:05:21,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529905131] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:21,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026046301] [2022-02-10 03:05:21,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:05:21,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:21,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:21,885 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:21,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-10 03:05:21,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:05:21,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:21,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:21,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:21,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:22,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:05:22,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-10 03:05:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:22,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:22,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:22,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-10 03:05:22,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:22,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-10 03:05:22,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:22,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-10 03:05:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:23,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026046301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:23,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:23,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:23,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162200400] [2022-02-10 03:05:23,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:23,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:23,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:23,046 INFO L87 Difference]: Start difference. First operand 382 states and 932 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:23,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:23,221 INFO L93 Difference]: Finished difference Result 522 states and 1233 transitions. [2022-02-10 03:05:23,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:05:23,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:23,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:23,223 INFO L225 Difference]: With dead ends: 522 [2022-02-10 03:05:23,223 INFO L226 Difference]: Without dead ends: 512 [2022-02-10 03:05:23,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:23,224 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:23,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 159 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 390 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-02-10 03:05:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-02-10 03:05:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 383. [2022-02-10 03:05:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.450261780104712) internal successors, (936), 382 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 936 transitions. [2022-02-10 03:05:23,230 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 936 transitions. Word has length 24 [2022-02-10 03:05:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:23,231 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 936 transitions. [2022-02-10 03:05:23,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 936 transitions. [2022-02-10 03:05:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:23,232 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:23,232 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:23,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:23,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:23,447 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1805308109, now seen corresponding path program 71 times [2022-02-10 03:05:23,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:23,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509992937] [2022-02-10 03:05:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:23,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:23,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:23,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509992937] [2022-02-10 03:05:23,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509992937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:23,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080496801] [2022-02-10 03:05:23,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:05:23,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:23,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:23,654 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:23,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-10 03:05:23,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:05:23,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:23,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:23,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:23,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:23,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:23,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:23,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:05:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:24,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:24,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:24,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-10 03:05:24,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:24,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 113 [2022-02-10 03:05:24,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:24,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 89 [2022-02-10 03:05:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:24,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080496801] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:24,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:24,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:24,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694779681] [2022-02-10 03:05:24,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:24,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:24,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:24,859 INFO L87 Difference]: Start difference. First operand 383 states and 936 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:25,184 INFO L93 Difference]: Finished difference Result 454 states and 1085 transitions. [2022-02-10 03:05:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:05:25,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:25,186 INFO L225 Difference]: With dead ends: 454 [2022-02-10 03:05:25,186 INFO L226 Difference]: Without dead ends: 449 [2022-02-10 03:05:25,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:05:25,186 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:25,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 158 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 522 Invalid, 0 Unknown, 264 Unchecked, 0.2s Time] [2022-02-10 03:05:25,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-02-10 03:05:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 384. [2022-02-10 03:05:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.454308093994778) internal successors, (940), 383 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 940 transitions. [2022-02-10 03:05:25,191 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 940 transitions. Word has length 24 [2022-02-10 03:05:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:25,191 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 940 transitions. [2022-02-10 03:05:25,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 940 transitions. [2022-02-10 03:05:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:25,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:25,192 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:25,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-10 03:05:25,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-10 03:05:25,392 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1011699435, now seen corresponding path program 72 times [2022-02-10 03:05:25,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:25,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016856519] [2022-02-10 03:05:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:25,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:25,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:25,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016856519] [2022-02-10 03:05:25,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016856519] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:25,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554219166] [2022-02-10 03:05:25,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:25,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:25,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:25,646 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:25,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-10 03:05:25,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:05:25,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:25,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:05:25,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:25,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:05:25,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:25,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 44 [2022-02-10 03:05:25,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:25,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2022-02-10 03:05:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:25,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:26,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:26,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-02-10 03:05:26,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:26,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2022-02-10 03:05:26,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:26,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2022-02-10 03:05:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:26,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554219166] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:26,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:26,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:05:26,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433699259] [2022-02-10 03:05:26,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:26,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:05:26,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:26,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:05:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:05:26,840 INFO L87 Difference]: Start difference. First operand 384 states and 940 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:27,594 INFO L93 Difference]: Finished difference Result 463 states and 1095 transitions. [2022-02-10 03:05:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:05:27,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:27,596 INFO L225 Difference]: With dead ends: 463 [2022-02-10 03:05:27,596 INFO L226 Difference]: Without dead ends: 447 [2022-02-10 03:05:27,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:05:27,596 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:27,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 101 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 543 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-02-10 03:05:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-10 03:05:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 389. [2022-02-10 03:05:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.445876288659794) internal successors, (949), 388 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 949 transitions. [2022-02-10 03:05:27,602 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 949 transitions. Word has length 24 [2022-02-10 03:05:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:27,602 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 949 transitions. [2022-02-10 03:05:27,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 949 transitions. [2022-02-10 03:05:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:27,603 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:27,604 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:27,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-10 03:05:27,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:27,815 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:27,816 INFO L85 PathProgramCache]: Analyzing trace with hash 823265493, now seen corresponding path program 73 times [2022-02-10 03:05:27,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:27,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256119180] [2022-02-10 03:05:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:27,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:28,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:28,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256119180] [2022-02-10 03:05:28,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256119180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:28,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726628212] [2022-02-10 03:05:28,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:28,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:28,053 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:28,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-10 03:05:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:05:28,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:28,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:05:28,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:05:28,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-10 03:05:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:28,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:28,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:28,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-02-10 03:05:29,198 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:05:29,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 65 [2022-02-10 03:05:29,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2022-02-10 03:05:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:29,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726628212] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:29,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:29,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-10 03:05:29,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196665290] [2022-02-10 03:05:29,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:29,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:05:29,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:05:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:05:29,228 INFO L87 Difference]: Start difference. First operand 389 states and 949 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:30,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:30,726 INFO L93 Difference]: Finished difference Result 762 states and 1734 transitions. [2022-02-10 03:05:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:05:30,726 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:30,728 INFO L225 Difference]: With dead ends: 762 [2022-02-10 03:05:30,728 INFO L226 Difference]: Without dead ends: 741 [2022-02-10 03:05:30,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=391, Invalid=1961, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 03:05:30,729 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 171 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:30,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 166 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 801 Invalid, 0 Unknown, 7 Unchecked, 0.4s Time] [2022-02-10 03:05:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-02-10 03:05:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 400. [2022-02-10 03:05:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.4235588972431077) internal successors, (967), 399 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 967 transitions. [2022-02-10 03:05:30,737 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 967 transitions. Word has length 24 [2022-02-10 03:05:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:30,737 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 967 transitions. [2022-02-10 03:05:30,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 967 transitions. [2022-02-10 03:05:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:30,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:30,738 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:30,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:30,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:30,959 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash -114859229, now seen corresponding path program 74 times [2022-02-10 03:05:30,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:30,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996763280] [2022-02-10 03:05:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:30,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:31,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:31,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996763280] [2022-02-10 03:05:31,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996763280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:31,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246873876] [2022-02-10 03:05:31,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:05:31,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:31,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:31,121 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:31,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-10 03:05:31,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:05:31,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:31,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:31,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:31,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:05:31,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-02-10 03:05:31,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:05:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:31,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:31,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:31,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:05:32,246 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:05:32,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2022-02-10 03:05:32,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 68 [2022-02-10 03:05:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:32,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246873876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:32,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:32,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:05:32,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988539481] [2022-02-10 03:05:32,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:32,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:05:32,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:05:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:32,283 INFO L87 Difference]: Start difference. First operand 400 states and 967 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:33,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:33,439 INFO L93 Difference]: Finished difference Result 610 states and 1430 transitions. [2022-02-10 03:05:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:05:33,440 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:33,441 INFO L225 Difference]: With dead ends: 610 [2022-02-10 03:05:33,441 INFO L226 Difference]: Without dead ends: 605 [2022-02-10 03:05:33,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-02-10 03:05:33,442 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:33,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 163 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 807 Invalid, 0 Unknown, 83 Unchecked, 0.4s Time] [2022-02-10 03:05:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-02-10 03:05:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 400. [2022-02-10 03:05:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.4235588972431077) internal successors, (967), 399 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:33,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 967 transitions. [2022-02-10 03:05:33,450 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 967 transitions. Word has length 24 [2022-02-10 03:05:33,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:33,450 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 967 transitions. [2022-02-10 03:05:33,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 967 transitions. [2022-02-10 03:05:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:05:33,451 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:33,451 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:33,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:33,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-02-10 03:05:33,669 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:33,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1745970885, now seen corresponding path program 75 times [2022-02-10 03:05:33,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:33,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388730314] [2022-02-10 03:05:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:33,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:33,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:33,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388730314] [2022-02-10 03:05:33,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388730314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:33,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690247889] [2022-02-10 03:05:33,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:05:33,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:33,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:33,876 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:33,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-10 03:05:33,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:05:33,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-10 03:05:33,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:34,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:05:34,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:05:34,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-10 03:05:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:34,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:34,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:34,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:05:34,884 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:05:34,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 91 [2022-02-10 03:05:34,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 64 [2022-02-10 03:05:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:34,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690247889] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:34,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:34,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-10 03:05:34,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463997540] [2022-02-10 03:05:34,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:34,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:05:34,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:34,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:05:34,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:05:34,917 INFO L87 Difference]: Start difference. First operand 400 states and 967 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:35,646 INFO L93 Difference]: Finished difference Result 578 states and 1351 transitions. [2022-02-10 03:05:35,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:05:35,646 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:05:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:35,647 INFO L225 Difference]: With dead ends: 578 [2022-02-10 03:05:35,647 INFO L226 Difference]: Without dead ends: 573 [2022-02-10 03:05:35,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:05:35,647 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 116 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:35,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 134 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 609 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2022-02-10 03:05:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-02-10 03:05:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 406. [2022-02-10 03:05:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.417283950617284) internal successors, (979), 405 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 979 transitions. [2022-02-10 03:05:35,652 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 979 transitions. Word has length 24 [2022-02-10 03:05:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:35,652 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 979 transitions. [2022-02-10 03:05:35,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 979 transitions. [2022-02-10 03:05:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:35,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:35,653 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:35,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-10 03:05:35,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:35,854 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1883215679, now seen corresponding path program 76 times [2022-02-10 03:05:35,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:35,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012242057] [2022-02-10 03:05:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:35,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:35,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:35,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012242057] [2022-02-10 03:05:35,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012242057] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:35,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695602636] [2022-02-10 03:05:35,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:05:35,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:35,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:35,968 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:35,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-10 03:05:36,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:05:36,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:36,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:05:36,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:36,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:05:36,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:05:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:36,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:36,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:36,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:36,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:36,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:36,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:36,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:36,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695602636] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:36,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:36,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:05:36,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043041343] [2022-02-10 03:05:36,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:36,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:05:36,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:05:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:05:36,289 INFO L87 Difference]: Start difference. First operand 406 states and 979 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:36,476 INFO L93 Difference]: Finished difference Result 492 states and 1164 transitions. [2022-02-10 03:05:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:05:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:36,477 INFO L225 Difference]: With dead ends: 492 [2022-02-10 03:05:36,477 INFO L226 Difference]: Without dead ends: 492 [2022-02-10 03:05:36,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:05:36,477 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:36,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 141 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:05:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-02-10 03:05:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 418. [2022-02-10 03:05:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.4244604316546763) internal successors, (1011), 417 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1011 transitions. [2022-02-10 03:05:36,482 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1011 transitions. Word has length 25 [2022-02-10 03:05:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:36,482 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1011 transitions. [2022-02-10 03:05:36,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1011 transitions. [2022-02-10 03:05:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:36,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:36,484 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:36,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-10 03:05:36,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:36,699 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:36,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:36,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2003845189, now seen corresponding path program 77 times [2022-02-10 03:05:36,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:36,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315065287] [2022-02-10 03:05:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:36,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:36,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:36,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315065287] [2022-02-10 03:05:36,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315065287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:36,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790646153] [2022-02-10 03:05:36,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:05:36,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:36,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:36,812 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:36,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-10 03:05:36,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:05:36,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:36,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:36,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:36,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:05:37,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:05:37,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:05:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:37,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:37,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:37,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:37,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:37,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:37,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:37,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:37,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790646153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:37,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:37,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:05:37,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087010100] [2022-02-10 03:05:37,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:37,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:05:37,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:37,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:05:37,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:05:37,261 INFO L87 Difference]: Start difference. First operand 418 states and 1011 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:37,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:37,458 INFO L93 Difference]: Finished difference Result 523 states and 1214 transitions. [2022-02-10 03:05:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:05:37,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:37,460 INFO L225 Difference]: With dead ends: 523 [2022-02-10 03:05:37,460 INFO L226 Difference]: Without dead ends: 511 [2022-02-10 03:05:37,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:05:37,460 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:37,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 124 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:05:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-02-10 03:05:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 428. [2022-02-10 03:05:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.4355971896955504) internal successors, (1040), 427 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1040 transitions. [2022-02-10 03:05:37,467 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1040 transitions. Word has length 25 [2022-02-10 03:05:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:37,467 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1040 transitions. [2022-02-10 03:05:37,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1040 transitions. [2022-02-10 03:05:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:37,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:37,468 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:37,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:37,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:37,687 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash 481086523, now seen corresponding path program 78 times [2022-02-10 03:05:37,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:37,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628899400] [2022-02-10 03:05:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:37,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:37,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:37,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628899400] [2022-02-10 03:05:37,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628899400] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:37,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583310596] [2022-02-10 03:05:37,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:37,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:37,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:37,813 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:37,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-10 03:05:37,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:05:37,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:37,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:05:38,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:05:38,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:05:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:38,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:38,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:38,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:05:38,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:38,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:38,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:38,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:38,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583310596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:38,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:38,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:05:38,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523365901] [2022-02-10 03:05:38,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:38,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:05:38,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:38,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:05:38,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:05:38,258 INFO L87 Difference]: Start difference. First operand 428 states and 1040 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:38,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:38,444 INFO L93 Difference]: Finished difference Result 510 states and 1204 transitions. [2022-02-10 03:05:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:05:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:38,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:38,445 INFO L225 Difference]: With dead ends: 510 [2022-02-10 03:05:38,445 INFO L226 Difference]: Without dead ends: 510 [2022-02-10 03:05:38,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:05:38,446 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:38,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 140 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:05:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-02-10 03:05:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 434. [2022-02-10 03:05:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.448036951501155) internal successors, (1060), 433 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1060 transitions. [2022-02-10 03:05:38,451 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1060 transitions. Word has length 25 [2022-02-10 03:05:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:38,451 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1060 transitions. [2022-02-10 03:05:38,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1060 transitions. [2022-02-10 03:05:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:38,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:38,452 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:38,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-02-10 03:05:38,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-02-10 03:05:38,653 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:38,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:38,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1366884803, now seen corresponding path program 79 times [2022-02-10 03:05:38,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:38,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346913103] [2022-02-10 03:05:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:38,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:38,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:38,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346913103] [2022-02-10 03:05:38,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346913103] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:38,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245346749] [2022-02-10 03:05:38,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:38,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:38,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:38,790 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:38,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-10 03:05:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:38,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:38,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:38,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:05:38,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:05:38,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:05:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:39,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:39,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:39,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:05:39,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:39,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:39,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:39,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:39,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245346749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:39,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:39,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:05:39,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715438248] [2022-02-10 03:05:39,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:39,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:05:39,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:39,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:05:39,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:05:39,243 INFO L87 Difference]: Start difference. First operand 434 states and 1060 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:39,519 INFO L93 Difference]: Finished difference Result 581 states and 1360 transitions. [2022-02-10 03:05:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:05:39,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:39,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:39,521 INFO L225 Difference]: With dead ends: 581 [2022-02-10 03:05:39,521 INFO L226 Difference]: Without dead ends: 581 [2022-02-10 03:05:39,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:05:39,521 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:39,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 136 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:05:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-02-10 03:05:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 456. [2022-02-10 03:05:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.4857142857142858) internal successors, (1131), 455 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1131 transitions. [2022-02-10 03:05:39,529 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1131 transitions. Word has length 25 [2022-02-10 03:05:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:39,529 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1131 transitions. [2022-02-10 03:05:39,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1131 transitions. [2022-02-10 03:05:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:39,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:39,531 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:39,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:39,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-02-10 03:05:39,754 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:39,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1463504139, now seen corresponding path program 80 times [2022-02-10 03:05:39,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:39,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647177123] [2022-02-10 03:05:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:39,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:39,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:39,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647177123] [2022-02-10 03:05:39,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647177123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:39,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018200356] [2022-02-10 03:05:39,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:05:39,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:39,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:39,884 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:39,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-10 03:05:39,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:05:39,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:39,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:39,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:40,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:05:40,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:05:40,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:05:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:40,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:40,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:40,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:40,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:40,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:40,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:40,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:40,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018200356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:40,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:40,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:05:40,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88807531] [2022-02-10 03:05:40,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:40,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:05:40,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:05:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:05:40,284 INFO L87 Difference]: Start difference. First operand 456 states and 1131 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:40,449 INFO L93 Difference]: Finished difference Result 536 states and 1296 transitions. [2022-02-10 03:05:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:05:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:40,450 INFO L225 Difference]: With dead ends: 536 [2022-02-10 03:05:40,450 INFO L226 Difference]: Without dead ends: 536 [2022-02-10 03:05:40,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:05:40,450 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:40,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 115 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:05:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-02-10 03:05:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 444. [2022-02-10 03:05:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.4808126410835216) internal successors, (1099), 443 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1099 transitions. [2022-02-10 03:05:40,455 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1099 transitions. Word has length 25 [2022-02-10 03:05:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:40,455 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 1099 transitions. [2022-02-10 03:05:40,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:40,455 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1099 transitions. [2022-02-10 03:05:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:40,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:40,456 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:40,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-10 03:05:40,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-10 03:05:40,656 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1600806497, now seen corresponding path program 81 times [2022-02-10 03:05:40,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:40,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643248390] [2022-02-10 03:05:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:40,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:40,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:40,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643248390] [2022-02-10 03:05:40,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643248390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:40,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758995214] [2022-02-10 03:05:40,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:05:40,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:40,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:40,743 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:40,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-10 03:05:40,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:05:40,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:40,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:40,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:40,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:41,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:41,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:41,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:41,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:41,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:41,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:41,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758995214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:41,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:41,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:05:41,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5256276] [2022-02-10 03:05:41,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:41,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:05:41,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:41,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:05:41,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:05:41,134 INFO L87 Difference]: Start difference. First operand 444 states and 1099 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:41,273 INFO L93 Difference]: Finished difference Result 547 states and 1327 transitions. [2022-02-10 03:05:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:05:41,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:41,274 INFO L225 Difference]: With dead ends: 547 [2022-02-10 03:05:41,274 INFO L226 Difference]: Without dead ends: 547 [2022-02-10 03:05:41,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:05:41,275 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:41,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 90 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:05:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-02-10 03:05:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 453. [2022-02-10 03:05:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.493362831858407) internal successors, (1127), 452 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1127 transitions. [2022-02-10 03:05:41,280 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1127 transitions. Word has length 25 [2022-02-10 03:05:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:41,280 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1127 transitions. [2022-02-10 03:05:41,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1127 transitions. [2022-02-10 03:05:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:41,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:41,281 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:41,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-02-10 03:05:41,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-02-10 03:05:41,481 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1305544767, now seen corresponding path program 82 times [2022-02-10 03:05:41,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:41,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047978505] [2022-02-10 03:05:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:41,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:41,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:41,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047978505] [2022-02-10 03:05:41,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047978505] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:41,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553343745] [2022-02-10 03:05:41,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:05:41,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:41,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:41,612 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:41,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-10 03:05:41,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:05:41,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:05:41,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:41,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:41,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:41,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:41,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:41,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:05:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:41,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:42,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:42,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:05:42,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:42,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:42,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:42,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:42,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553343745] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:42,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:42,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:42,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847246940] [2022-02-10 03:05:42,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:42,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:42,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:42,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:42,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:42,152 INFO L87 Difference]: Start difference. First operand 453 states and 1127 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:42,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:42,533 INFO L93 Difference]: Finished difference Result 623 states and 1478 transitions. [2022-02-10 03:05:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:05:42,533 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:42,534 INFO L225 Difference]: With dead ends: 623 [2022-02-10 03:05:42,534 INFO L226 Difference]: Without dead ends: 623 [2022-02-10 03:05:42,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:05:42,535 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:42,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 147 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 359 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-02-10 03:05:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-10 03:05:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 454. [2022-02-10 03:05:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.4966887417218544) internal successors, (1131), 453 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1131 transitions. [2022-02-10 03:05:42,540 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1131 transitions. Word has length 25 [2022-02-10 03:05:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:42,541 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1131 transitions. [2022-02-10 03:05:42,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1131 transitions. [2022-02-10 03:05:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:42,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:42,541 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:42,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-10 03:05:42,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:42,742 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1083652873, now seen corresponding path program 83 times [2022-02-10 03:05:42,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:42,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640496615] [2022-02-10 03:05:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:42,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:42,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:42,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640496615] [2022-02-10 03:05:42,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640496615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:42,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29180434] [2022-02-10 03:05:42,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:05:42,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:42,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:42,872 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:42,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-10 03:05:42,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:05:42,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:42,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:05:42,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:42,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:43,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:43,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:05:43,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:43,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:05:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:43,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:43,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:43,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:05:43,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:43,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:43,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:43,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:43,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29180434] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:43,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:43,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:43,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079065303] [2022-02-10 03:05:43,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:43,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:43,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:43,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:43,411 INFO L87 Difference]: Start difference. First operand 454 states and 1131 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:43,658 INFO L93 Difference]: Finished difference Result 558 states and 1358 transitions. [2022-02-10 03:05:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:05:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:43,660 INFO L225 Difference]: With dead ends: 558 [2022-02-10 03:05:43,660 INFO L226 Difference]: Without dead ends: 558 [2022-02-10 03:05:43,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:05:43,660 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:43,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 167 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 487 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-02-10 03:05:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-02-10 03:05:43,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 453. [2022-02-10 03:05:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.4889380530973453) internal successors, (1125), 452 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1125 transitions. [2022-02-10 03:05:43,666 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1125 transitions. Word has length 25 [2022-02-10 03:05:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:43,666 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1125 transitions. [2022-02-10 03:05:43,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1125 transitions. [2022-02-10 03:05:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:43,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:43,667 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:43,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:43,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:43,887 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:43,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1439217669, now seen corresponding path program 84 times [2022-02-10 03:05:43,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:43,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784928926] [2022-02-10 03:05:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:43,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:43,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:43,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784928926] [2022-02-10 03:05:43,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784928926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:43,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025662298] [2022-02-10 03:05:43,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:43,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:43,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:44,000 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:44,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-10 03:05:44,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:05:44,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:44,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:44,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:44,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:05:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:44,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:44,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:44,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:05:44,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:44,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:44,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:44,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:44,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025662298] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:44,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:44,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:05:44,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109082393] [2022-02-10 03:05:44,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:44,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:05:44,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:05:44,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:05:44,510 INFO L87 Difference]: Start difference. First operand 453 states and 1125 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:44,800 INFO L93 Difference]: Finished difference Result 574 states and 1367 transitions. [2022-02-10 03:05:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:05:44,800 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:44,801 INFO L225 Difference]: With dead ends: 574 [2022-02-10 03:05:44,801 INFO L226 Difference]: Without dead ends: 562 [2022-02-10 03:05:44,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:05:44,802 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:44,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 168 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:05:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-02-10 03:05:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 463. [2022-02-10 03:05:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.497835497835498) internal successors, (1154), 462 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1154 transitions. [2022-02-10 03:05:44,807 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1154 transitions. Word has length 25 [2022-02-10 03:05:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:44,807 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1154 transitions. [2022-02-10 03:05:44,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1154 transitions. [2022-02-10 03:05:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:44,808 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:44,808 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:44,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-10 03:05:45,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:45,008 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1045714043, now seen corresponding path program 85 times [2022-02-10 03:05:45,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:45,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253781969] [2022-02-10 03:05:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:45,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:45,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:45,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253781969] [2022-02-10 03:05:45,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253781969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:45,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538239097] [2022-02-10 03:05:45,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:45,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:45,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:45,157 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:45,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-10 03:05:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:45,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:45,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:45,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:45,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:45,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:45,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:05:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:45,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:45,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:45,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:05:45,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:45,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:45,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:45,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:45,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538239097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:45,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:45,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:45,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128926445] [2022-02-10 03:05:45,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:45,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:45,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:45,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:45,969 INFO L87 Difference]: Start difference. First operand 463 states and 1154 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:46,191 INFO L93 Difference]: Finished difference Result 564 states and 1365 transitions. [2022-02-10 03:05:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:05:46,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:46,192 INFO L225 Difference]: With dead ends: 564 [2022-02-10 03:05:46,192 INFO L226 Difference]: Without dead ends: 564 [2022-02-10 03:05:46,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:05:46,193 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:46,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 166 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 449 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-02-10 03:05:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-02-10 03:05:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 463. [2022-02-10 03:05:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.497835497835498) internal successors, (1154), 462 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1154 transitions. [2022-02-10 03:05:46,198 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1154 transitions. Word has length 25 [2022-02-10 03:05:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:46,198 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1154 transitions. [2022-02-10 03:05:46,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1154 transitions. [2022-02-10 03:05:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:46,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:46,199 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:46,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:46,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:46,399 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:46,400 INFO L85 PathProgramCache]: Analyzing trace with hash -605089921, now seen corresponding path program 86 times [2022-02-10 03:05:46,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:46,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414432792] [2022-02-10 03:05:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:46,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:46,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:46,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414432792] [2022-02-10 03:05:46,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414432792] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:46,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701955729] [2022-02-10 03:05:46,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:05:46,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:46,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:46,525 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:46,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-10 03:05:46,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:05:46,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:46,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:46,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:46,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:46,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:46,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:05:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:46,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:46,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:46,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:05:47,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:47,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:47,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:47,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:47,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701955729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:47,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:47,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:05:47,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781246701] [2022-02-10 03:05:47,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:47,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:05:47,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:47,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:05:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:05:47,063 INFO L87 Difference]: Start difference. First operand 463 states and 1154 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:47,272 INFO L93 Difference]: Finished difference Result 544 states and 1321 transitions. [2022-02-10 03:05:47,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:05:47,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:47,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:47,273 INFO L225 Difference]: With dead ends: 544 [2022-02-10 03:05:47,273 INFO L226 Difference]: Without dead ends: 544 [2022-02-10 03:05:47,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:05:47,274 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:47,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 136 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 417 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-02-10 03:05:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-02-10 03:05:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 447. [2022-02-10 03:05:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.486547085201794) internal successors, (1109), 446 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1109 transitions. [2022-02-10 03:05:47,279 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1109 transitions. Word has length 25 [2022-02-10 03:05:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:47,279 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1109 transitions. [2022-02-10 03:05:47,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1109 transitions. [2022-02-10 03:05:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:47,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:47,280 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:47,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:47,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:47,481 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:47,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1854863433, now seen corresponding path program 87 times [2022-02-10 03:05:47,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:47,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838868098] [2022-02-10 03:05:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:47,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:47,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:47,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838868098] [2022-02-10 03:05:47,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838868098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:47,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928488492] [2022-02-10 03:05:47,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:05:47,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:47,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:47,601 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:47,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-10 03:05:47,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:05:47,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:47,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:47,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:47,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:47,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:47,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:05:47,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:47,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:05:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:47,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:48,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:48,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:48,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:48,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:48,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:48,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:48,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928488492] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:48,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:48,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:05:48,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228525459] [2022-02-10 03:05:48,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:48,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:05:48,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:48,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:05:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:05:48,118 INFO L87 Difference]: Start difference. First operand 447 states and 1109 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:48,528 INFO L93 Difference]: Finished difference Result 605 states and 1435 transitions. [2022-02-10 03:05:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:05:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:48,529 INFO L225 Difference]: With dead ends: 605 [2022-02-10 03:05:48,529 INFO L226 Difference]: Without dead ends: 605 [2022-02-10 03:05:48,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:05:48,529 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:48,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 187 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 591 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2022-02-10 03:05:48,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-02-10 03:05:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 452. [2022-02-10 03:05:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.505543237250554) internal successors, (1130), 451 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1130 transitions. [2022-02-10 03:05:48,535 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1130 transitions. Word has length 25 [2022-02-10 03:05:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:48,535 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1130 transitions. [2022-02-10 03:05:48,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1130 transitions. [2022-02-10 03:05:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:48,536 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:48,536 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:48,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-10 03:05:48,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-02-10 03:05:48,737 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:48,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2002396707, now seen corresponding path program 88 times [2022-02-10 03:05:48,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:48,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311727400] [2022-02-10 03:05:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:48,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:48,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:48,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311727400] [2022-02-10 03:05:48,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311727400] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:48,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115909417] [2022-02-10 03:05:48,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:05:48,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:48,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:48,876 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:48,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-10 03:05:48,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:05:48,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:48,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:05:48,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:49,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:49,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:49,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-02-10 03:05:49,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:49,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2022-02-10 03:05:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:49,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:49,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:49,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:49,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:49,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:49,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:49,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:49,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115909417] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:49,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:49,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:05:49,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324902804] [2022-02-10 03:05:49,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:49,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:05:49,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:49,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:05:49,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:05:49,650 INFO L87 Difference]: Start difference. First operand 452 states and 1130 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:49,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:49,826 INFO L93 Difference]: Finished difference Result 552 states and 1330 transitions. [2022-02-10 03:05:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:05:49,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:49,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:49,827 INFO L225 Difference]: With dead ends: 552 [2022-02-10 03:05:49,827 INFO L226 Difference]: Without dead ends: 544 [2022-02-10 03:05:49,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:49,827 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:49,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 104 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 231 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-02-10 03:05:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-02-10 03:05:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 447. [2022-02-10 03:05:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.486547085201794) internal successors, (1109), 446 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1109 transitions. [2022-02-10 03:05:49,832 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1109 transitions. Word has length 25 [2022-02-10 03:05:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:49,832 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1109 transitions. [2022-02-10 03:05:49,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1109 transitions. [2022-02-10 03:05:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:49,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:49,833 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:49,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-02-10 03:05:50,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-02-10 03:05:50,034 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:50,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:50,034 INFO L85 PathProgramCache]: Analyzing trace with hash 482535005, now seen corresponding path program 89 times [2022-02-10 03:05:50,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:50,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810514859] [2022-02-10 03:05:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:50,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:50,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:50,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810514859] [2022-02-10 03:05:50,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810514859] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:50,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18668150] [2022-02-10 03:05:50,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:05:50,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:50,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:50,176 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:50,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-10 03:05:50,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:05:50,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:50,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:50,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:50,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:50,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:50,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:05:50,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:50,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:05:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:50,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:50,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:50,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:05:50,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:50,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:50,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:50,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:50,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18668150] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:50,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:50,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:50,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286223206] [2022-02-10 03:05:50,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:50,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:50,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:50,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:50,780 INFO L87 Difference]: Start difference. First operand 447 states and 1109 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:51,176 INFO L93 Difference]: Finished difference Result 603 states and 1447 transitions. [2022-02-10 03:05:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:05:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:51,177 INFO L225 Difference]: With dead ends: 603 [2022-02-10 03:05:51,177 INFO L226 Difference]: Without dead ends: 603 [2022-02-10 03:05:51,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:51,178 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:51,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 175 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 505 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-02-10 03:05:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-10 03:05:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 455. [2022-02-10 03:05:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.5066079295154187) internal successors, (1138), 454 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1138 transitions. [2022-02-10 03:05:51,184 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1138 transitions. Word has length 25 [2022-02-10 03:05:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:51,184 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1138 transitions. [2022-02-10 03:05:51,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1138 transitions. [2022-02-10 03:05:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:51,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:51,185 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:51,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-10 03:05:51,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:51,385 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:51,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1600688957, now seen corresponding path program 90 times [2022-02-10 03:05:51,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:51,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27257677] [2022-02-10 03:05:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:51,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:51,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:51,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27257677] [2022-02-10 03:05:51,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27257677] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:51,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904420203] [2022-02-10 03:05:51,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:51,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:51,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:51,481 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:51,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-10 03:05:51,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:05:51,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:51,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:51,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:51,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:51,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:05:51,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:05:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:51,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:51,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:51,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:51,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:51,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:51,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:51,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:51,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904420203] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:51,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:51,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:05:51,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201976583] [2022-02-10 03:05:51,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:51,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:05:51,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:05:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:05:51,875 INFO L87 Difference]: Start difference. First operand 455 states and 1138 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:52,089 INFO L93 Difference]: Finished difference Result 544 states and 1316 transitions. [2022-02-10 03:05:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:05:52,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:52,090 INFO L225 Difference]: With dead ends: 544 [2022-02-10 03:05:52,090 INFO L226 Difference]: Without dead ends: 536 [2022-02-10 03:05:52,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:52,090 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:52,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 99 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:05:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-02-10 03:05:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 454. [2022-02-10 03:05:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.501103752759382) internal successors, (1133), 453 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1133 transitions. [2022-02-10 03:05:52,096 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1133 transitions. Word has length 25 [2022-02-10 03:05:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:52,096 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1133 transitions. [2022-02-10 03:05:52,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1133 transitions. [2022-02-10 03:05:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:52,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:52,097 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:52,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-10 03:05:52,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:52,297 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:52,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash 187273275, now seen corresponding path program 91 times [2022-02-10 03:05:52,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:52,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948674634] [2022-02-10 03:05:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:52,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:52,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:52,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948674634] [2022-02-10 03:05:52,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948674634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:52,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8417550] [2022-02-10 03:05:52,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:52,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:52,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:52,426 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:52,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-10 03:05:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:52,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:52,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:52,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:52,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:52,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:05:52,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:52,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:05:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:52,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:52,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:52,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:05:52,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:52,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:52,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:52,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:52,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8417550] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:52,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:52,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:52,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506337327] [2022-02-10 03:05:52,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:52,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:52,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:52,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:52,995 INFO L87 Difference]: Start difference. First operand 454 states and 1133 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:53,280 INFO L93 Difference]: Finished difference Result 564 states and 1359 transitions. [2022-02-10 03:05:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:05:53,280 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:53,281 INFO L225 Difference]: With dead ends: 564 [2022-02-10 03:05:53,281 INFO L226 Difference]: Without dead ends: 564 [2022-02-10 03:05:53,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:05:53,282 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:53,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 126 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 324 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-02-10 03:05:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-02-10 03:05:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 448. [2022-02-10 03:05:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.4876957494407157) internal successors, (1112), 447 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1112 transitions. [2022-02-10 03:05:53,287 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1112 transitions. Word has length 25 [2022-02-10 03:05:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:53,287 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 1112 transitions. [2022-02-10 03:05:53,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1112 transitions. [2022-02-10 03:05:53,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:53,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:53,288 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:53,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:53,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:53,488 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1294128613, now seen corresponding path program 92 times [2022-02-10 03:05:53,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:53,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527417339] [2022-02-10 03:05:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:53,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:53,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:53,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527417339] [2022-02-10 03:05:53,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527417339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:53,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498673708] [2022-02-10 03:05:53,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:05:53,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:53,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:53,608 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:53,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-10 03:05:53,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:05:53,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:53,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:53,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:53,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:53,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:05:53,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:53,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:05:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:53,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:54,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:54,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:54,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:54,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:54,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:54,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:54,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498673708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:54,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:54,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:54,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571109862] [2022-02-10 03:05:54,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:54,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:54,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:54,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:54,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:54,207 INFO L87 Difference]: Start difference. First operand 448 states and 1112 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:54,357 INFO L93 Difference]: Finished difference Result 557 states and 1339 transitions. [2022-02-10 03:05:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:05:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:54,359 INFO L225 Difference]: With dead ends: 557 [2022-02-10 03:05:54,359 INFO L226 Difference]: Without dead ends: 557 [2022-02-10 03:05:54,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:05:54,359 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:54,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 121 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 317 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-02-10 03:05:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-02-10 03:05:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 457. [2022-02-10 03:05:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 2.508771929824561) internal successors, (1144), 456 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1144 transitions. [2022-02-10 03:05:54,365 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1144 transitions. Word has length 25 [2022-02-10 03:05:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:54,365 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1144 transitions. [2022-02-10 03:05:54,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1144 transitions. [2022-02-10 03:05:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:54,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:54,366 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:54,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-02-10 03:05:54,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:54,567 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash 998866883, now seen corresponding path program 93 times [2022-02-10 03:05:54,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:54,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682421376] [2022-02-10 03:05:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:54,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:54,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:54,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682421376] [2022-02-10 03:05:54,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682421376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:54,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808037083] [2022-02-10 03:05:54,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:05:54,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:54,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:54,703 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:54,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-10 03:05:54,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:05:54,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:54,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:54,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:54,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:54,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:05:54,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:54,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:05:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:55,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:55,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:55,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:05:55,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:55,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:55,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:55,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:55,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808037083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:55,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:55,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:55,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904040382] [2022-02-10 03:05:55,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:55,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:55,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:55,275 INFO L87 Difference]: Start difference. First operand 457 states and 1144 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:55,479 INFO L93 Difference]: Finished difference Result 541 states and 1316 transitions. [2022-02-10 03:05:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:05:55,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:55,480 INFO L225 Difference]: With dead ends: 541 [2022-02-10 03:05:55,480 INFO L226 Difference]: Without dead ends: 541 [2022-02-10 03:05:55,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:05:55,480 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:55,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 119 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 379 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-02-10 03:05:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-02-10 03:05:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 449. [2022-02-10 03:05:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.4910714285714284) internal successors, (1116), 448 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1116 transitions. [2022-02-10 03:05:55,485 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1116 transitions. Word has length 25 [2022-02-10 03:05:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:55,485 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1116 transitions. [2022-02-10 03:05:55,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1116 transitions. [2022-02-10 03:05:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:55,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:55,486 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:55,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-10 03:05:55,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-10 03:05:55,687 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1699402931, now seen corresponding path program 94 times [2022-02-10 03:05:55,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:55,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147480500] [2022-02-10 03:05:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:55,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:55,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:55,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147480500] [2022-02-10 03:05:55,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147480500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:55,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754694108] [2022-02-10 03:05:55,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:05:55,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:55,808 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:55,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-10 03:05:55,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:05:55,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:55,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:55,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:55,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:55,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:56,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:56,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:05:56,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:56,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:05:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:56,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:56,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:56,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:56,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:56,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:56,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:56,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:56,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754694108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:56,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:56,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:56,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543336338] [2022-02-10 03:05:56,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:56,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:56,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:56,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:56,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:56,382 INFO L87 Difference]: Start difference. First operand 449 states and 1116 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:56,518 INFO L93 Difference]: Finished difference Result 528 states and 1303 transitions. [2022-02-10 03:05:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:05:56,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:56,519 INFO L225 Difference]: With dead ends: 528 [2022-02-10 03:05:56,519 INFO L226 Difference]: Without dead ends: 528 [2022-02-10 03:05:56,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:05:56,519 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:56,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 115 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-02-10 03:05:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-02-10 03:05:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 455. [2022-02-10 03:05:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.504405286343612) internal successors, (1137), 454 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1137 transitions. [2022-02-10 03:05:56,524 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1137 transitions. Word has length 25 [2022-02-10 03:05:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:56,525 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1137 transitions. [2022-02-10 03:05:56,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1137 transitions. [2022-02-10 03:05:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:56,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:56,526 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:56,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-02-10 03:05:56,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-02-10 03:05:56,726 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:56,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:56,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1469367297, now seen corresponding path program 95 times [2022-02-10 03:05:56,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:56,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758870365] [2022-02-10 03:05:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:56,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:56,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:56,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758870365] [2022-02-10 03:05:56,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758870365] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:56,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733021323] [2022-02-10 03:05:56,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:05:56,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:56,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:56,859 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:56,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-10 03:05:56,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:05:56,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:56,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:05:56,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:57,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:57,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:57,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:57,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:05:57,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:57,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:05:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:57,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:57,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:57,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-10 03:05:57,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:57,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:05:57,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:57,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:05:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:57,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733021323] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:57,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:57,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:05:57,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267049210] [2022-02-10 03:05:57,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:57,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:05:57,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:57,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:05:57,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:05:57,532 INFO L87 Difference]: Start difference. First operand 455 states and 1137 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:57,613 INFO L93 Difference]: Finished difference Result 523 states and 1262 transitions. [2022-02-10 03:05:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:05:57,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:57,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:57,614 INFO L225 Difference]: With dead ends: 523 [2022-02-10 03:05:57,614 INFO L226 Difference]: Without dead ends: 509 [2022-02-10 03:05:57,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:05:57,614 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:57,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 216 Unchecked, 0.1s Time] [2022-02-10 03:05:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-10 03:05:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 455. [2022-02-10 03:05:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.4933920704845813) internal successors, (1132), 454 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1132 transitions. [2022-02-10 03:05:57,619 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1132 transitions. Word has length 25 [2022-02-10 03:05:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:57,619 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1132 transitions. [2022-02-10 03:05:57,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1132 transitions. [2022-02-10 03:05:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:57,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:57,620 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:57,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-10 03:05:57,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-10 03:05:57,820 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1745895553, now seen corresponding path program 96 times [2022-02-10 03:05:57,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:57,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139685254] [2022-02-10 03:05:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:57,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:57,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:57,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139685254] [2022-02-10 03:05:57,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139685254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:57,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576572490] [2022-02-10 03:05:57,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:05:57,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:57,942 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:57,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-10 03:05:57,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:05:57,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:05:57,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:57,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:58,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:58,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:58,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:58,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:58,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:58,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:05:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:58,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:58,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:58,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:05:58,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:58,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:58,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:58,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:05:58,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576572490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:58,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:58,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:58,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210934201] [2022-02-10 03:05:58,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:58,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:58,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:58,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:58,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:58,664 INFO L87 Difference]: Start difference. First operand 455 states and 1132 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:58,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:58,719 INFO L93 Difference]: Finished difference Result 522 states and 1266 transitions. [2022-02-10 03:05:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:05:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:58,720 INFO L225 Difference]: With dead ends: 522 [2022-02-10 03:05:58,720 INFO L226 Difference]: Without dead ends: 522 [2022-02-10 03:05:58,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:58,720 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:58,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 98 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-02-10 03:05:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-02-10 03:05:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 466. [2022-02-10 03:05:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.52258064516129) internal successors, (1173), 465 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1173 transitions. [2022-02-10 03:05:58,726 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1173 transitions. Word has length 25 [2022-02-10 03:05:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:58,726 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1173 transitions. [2022-02-10 03:05:58,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1173 transitions. [2022-02-10 03:05:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:58,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:58,727 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:58,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:58,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-10 03:05:58,940 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:05:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:05:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1281485687, now seen corresponding path program 97 times [2022-02-10 03:05:58,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:05:58,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746872484] [2022-02-10 03:05:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:05:58,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:05:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:59,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:05:59,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746872484] [2022-02-10 03:05:59,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746872484] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:05:59,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514989866] [2022-02-10 03:05:59,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:05:59,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:59,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:05:59,054 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:05:59,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-10 03:05:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:05:59,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:05:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:05:59,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:59,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:05:59,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:59,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:05:59,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:05:59,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:05:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:59,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:05:59,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:59,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:59,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:59,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:05:59,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:05:59,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:05:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:05:59,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514989866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:05:59,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:05:59,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:05:59,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725054540] [2022-02-10 03:05:59,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:05:59,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:05:59,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:05:59,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:05:59,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:05:59,740 INFO L87 Difference]: Start difference. First operand 466 states and 1173 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:59,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:05:59,842 INFO L93 Difference]: Finished difference Result 566 states and 1386 transitions. [2022-02-10 03:05:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:05:59,842 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:05:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:05:59,843 INFO L225 Difference]: With dead ends: 566 [2022-02-10 03:05:59,843 INFO L226 Difference]: Without dead ends: 566 [2022-02-10 03:05:59,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:05:59,843 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:05:59,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 98 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-02-10 03:05:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-02-10 03:05:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 461. [2022-02-10 03:05:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.506521739130435) internal successors, (1153), 460 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1153 transitions. [2022-02-10 03:05:59,848 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1153 transitions. Word has length 25 [2022-02-10 03:05:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:05:59,848 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1153 transitions. [2022-02-10 03:05:59,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:05:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1153 transitions. [2022-02-10 03:05:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:05:59,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:05:59,849 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:05:59,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-02-10 03:06:00,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-02-10 03:06:00,050 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash -914144001, now seen corresponding path program 98 times [2022-02-10 03:06:00,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:00,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917864151] [2022-02-10 03:06:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:00,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:00,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:00,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917864151] [2022-02-10 03:06:00,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917864151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:00,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92682217] [2022-02-10 03:06:00,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:00,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:00,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:00,180 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:00,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-10 03:06:00,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:00,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:00,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:00,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:00,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:00,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:00,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:06:00,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:00,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:06:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:00,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:00,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:00,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:00,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:00,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:06:00,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:00,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:06:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:00,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92682217] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:00,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:00,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:06:00,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700988331] [2022-02-10 03:06:00,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:00,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:06:00,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:06:00,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:06:00,715 INFO L87 Difference]: Start difference. First operand 461 states and 1153 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:00,870 INFO L93 Difference]: Finished difference Result 536 states and 1291 transitions. [2022-02-10 03:06:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:00,871 INFO L225 Difference]: With dead ends: 536 [2022-02-10 03:06:00,871 INFO L226 Difference]: Without dead ends: 532 [2022-02-10 03:06:00,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:00,872 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:00,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 111 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 164 Unchecked, 0.1s Time] [2022-02-10 03:06:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-02-10 03:06:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 468. [2022-02-10 03:06:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.486081370449679) internal successors, (1161), 467 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1161 transitions. [2022-02-10 03:06:00,877 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1161 transitions. Word has length 25 [2022-02-10 03:06:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:00,877 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1161 transitions. [2022-02-10 03:06:00,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1161 transitions. [2022-02-10 03:06:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:00,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:00,878 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:00,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-02-10 03:06:01,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:01,079 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash 946686113, now seen corresponding path program 99 times [2022-02-10 03:06:01,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:01,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950032900] [2022-02-10 03:06:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:01,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:01,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:01,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950032900] [2022-02-10 03:06:01,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950032900] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:01,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485225150] [2022-02-10 03:06:01,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:01,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:01,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:01,205 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:01,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-10 03:06:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:06:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:01,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:01,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:01,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:06:01,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:01,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:06:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:01,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:01,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:01,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:01,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:01,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:06:01,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:01,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:06:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:01,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485225150] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:01,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:01,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:06:01,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548941875] [2022-02-10 03:06:01,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:01,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:06:01,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:01,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:06:01,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:06:01,748 INFO L87 Difference]: Start difference. First operand 468 states and 1161 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:01,895 INFO L93 Difference]: Finished difference Result 518 states and 1255 transitions. [2022-02-10 03:06:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:01,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:01,896 INFO L225 Difference]: With dead ends: 518 [2022-02-10 03:06:01,896 INFO L226 Difference]: Without dead ends: 509 [2022-02-10 03:06:01,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:01,897 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:01,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 87 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2022-02-10 03:06:01,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-02-10 03:06:01,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 461. [2022-02-10 03:06:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.5043478260869567) internal successors, (1152), 460 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1152 transitions. [2022-02-10 03:06:01,902 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1152 transitions. Word has length 25 [2022-02-10 03:06:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:01,902 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1152 transitions. [2022-02-10 03:06:01,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1152 transitions. [2022-02-10 03:06:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:01,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:01,902 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:01,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-10 03:06:02,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:02,103 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1985892705, now seen corresponding path program 100 times [2022-02-10 03:06:02,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:02,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716967470] [2022-02-10 03:06:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:02,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:02,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:02,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716967470] [2022-02-10 03:06:02,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716967470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:02,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881345057] [2022-02-10 03:06:02,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:02,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:02,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:02,243 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:02,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-10 03:06:02,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:02,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:02,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:02,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:02,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:02,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:02,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:02,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:06:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:02,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:02,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:02,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:02,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:02,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:02,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:02,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:06:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:02,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881345057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:02,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:02,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:02,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398852564] [2022-02-10 03:06:02,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:02,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:02,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:02,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:02,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:02,850 INFO L87 Difference]: Start difference. First operand 461 states and 1152 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:02,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:02,916 INFO L93 Difference]: Finished difference Result 551 states and 1350 transitions. [2022-02-10 03:06:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:02,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:02,917 INFO L225 Difference]: With dead ends: 551 [2022-02-10 03:06:02,917 INFO L226 Difference]: Without dead ends: 551 [2022-02-10 03:06:02,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:02,917 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:02,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 113 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-02-10 03:06:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-02-10 03:06:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 462. [2022-02-10 03:06:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.507592190889371) internal successors, (1156), 461 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1156 transitions. [2022-02-10 03:06:02,922 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1156 transitions. Word has length 25 [2022-02-10 03:06:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:02,922 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1156 transitions. [2022-02-10 03:06:02,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1156 transitions. [2022-02-10 03:06:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:02,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:02,923 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:02,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-02-10 03:06:03,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-10 03:06:03,124 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1232545919, now seen corresponding path program 101 times [2022-02-10 03:06:03,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:03,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036594036] [2022-02-10 03:06:03,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:03,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:03,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:03,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036594036] [2022-02-10 03:06:03,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036594036] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:03,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662613693] [2022-02-10 03:06:03,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:03,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:03,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:03,267 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:03,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-10 03:06:03,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:06:03,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:03,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:03,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:03,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:06:03,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:03,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:06:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:03,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:03,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:03,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:03,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:03,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:03,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:03,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:06:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:03,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662613693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:03,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:03,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:03,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019989963] [2022-02-10 03:06:03,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:03,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:03,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:03,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:03,935 INFO L87 Difference]: Start difference. First operand 462 states and 1156 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:04,062 INFO L93 Difference]: Finished difference Result 556 states and 1357 transitions. [2022-02-10 03:06:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:04,063 INFO L225 Difference]: With dead ends: 556 [2022-02-10 03:06:04,063 INFO L226 Difference]: Without dead ends: 556 [2022-02-10 03:06:04,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:04,064 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:04,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 104 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 274 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-02-10 03:06:04,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-02-10 03:06:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 462. [2022-02-10 03:06:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.507592190889371) internal successors, (1156), 461 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1156 transitions. [2022-02-10 03:06:04,069 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1156 transitions. Word has length 25 [2022-02-10 03:06:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:04,069 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1156 transitions. [2022-02-10 03:06:04,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1156 transitions. [2022-02-10 03:06:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:04,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:04,070 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:04,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-02-10 03:06:04,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-02-10 03:06:04,270 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:04,270 INFO L85 PathProgramCache]: Analyzing trace with hash 741607555, now seen corresponding path program 102 times [2022-02-10 03:06:04,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:04,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169098169] [2022-02-10 03:06:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:04,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:04,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:04,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169098169] [2022-02-10 03:06:04,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169098169] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:04,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847455300] [2022-02-10 03:06:04,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:04,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:04,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:04,407 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:04,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-10 03:06:04,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:06:04,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:04,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:04,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:04,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:04,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:04,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:04,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:04,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:06:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:04,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:04,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:04,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:04,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:04,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:04,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:04,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:04,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847455300] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:04,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:04,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:04,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018170170] [2022-02-10 03:06:04,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:04,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:04,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:04,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:04,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:04,897 INFO L87 Difference]: Start difference. First operand 462 states and 1156 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:05,067 INFO L93 Difference]: Finished difference Result 531 states and 1290 transitions. [2022-02-10 03:06:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:05,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:05,069 INFO L225 Difference]: With dead ends: 531 [2022-02-10 03:06:05,069 INFO L226 Difference]: Without dead ends: 531 [2022-02-10 03:06:05,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:05,069 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:05,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 151 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 359 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-02-10 03:06:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-02-10 03:06:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 466. [2022-02-10 03:06:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.5161290322580645) internal successors, (1170), 465 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1170 transitions. [2022-02-10 03:06:05,074 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1170 transitions. Word has length 25 [2022-02-10 03:06:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:05,074 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1170 transitions. [2022-02-10 03:06:05,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1170 transitions. [2022-02-10 03:06:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:05,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:05,075 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:05,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-10 03:06:05,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:05,275 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:05,276 INFO L85 PathProgramCache]: Analyzing trace with hash -13813523, now seen corresponding path program 103 times [2022-02-10 03:06:05,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:05,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707125808] [2022-02-10 03:06:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:05,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:05,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:05,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707125808] [2022-02-10 03:06:05,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707125808] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:05,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976976491] [2022-02-10 03:06:05,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:05,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:05,392 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:05,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-10 03:06:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:05,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:05,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:05,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:06:05,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:06:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:05,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:05,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:05,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:05,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:05,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:05,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:05,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:05,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976976491] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:05,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:05,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:06:05,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150988414] [2022-02-10 03:06:05,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:05,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:05,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:05,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:05,897 INFO L87 Difference]: Start difference. First operand 466 states and 1170 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:06,082 INFO L93 Difference]: Finished difference Result 533 states and 1325 transitions. [2022-02-10 03:06:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:06:06,083 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:06,084 INFO L225 Difference]: With dead ends: 533 [2022-02-10 03:06:06,084 INFO L226 Difference]: Without dead ends: 533 [2022-02-10 03:06:06,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:06,085 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:06,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 95 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:06:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-02-10 03:06:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 484. [2022-02-10 03:06:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.540372670807453) internal successors, (1227), 483 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1227 transitions. [2022-02-10 03:06:06,092 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1227 transitions. Word has length 25 [2022-02-10 03:06:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:06,092 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1227 transitions. [2022-02-10 03:06:06,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1227 transitions. [2022-02-10 03:06:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:06,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:06,093 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:06,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:06,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:06,307 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash -309075253, now seen corresponding path program 104 times [2022-02-10 03:06:06,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:06,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985630476] [2022-02-10 03:06:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:06,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:06,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:06,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985630476] [2022-02-10 03:06:06,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985630476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:06,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632631535] [2022-02-10 03:06:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:06,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:06,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:06,455 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:06,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-10 03:06:06,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:06,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:06,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:06,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:06,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:06,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:06:06,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:06,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:06:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:06,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:06,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:06,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:06,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:06,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:06,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:06,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:07,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632631535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:07,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:07,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:07,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746526096] [2022-02-10 03:06:07,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:07,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:07,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:07,002 INFO L87 Difference]: Start difference. First operand 484 states and 1227 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:07,262 INFO L93 Difference]: Finished difference Result 571 states and 1406 transitions. [2022-02-10 03:06:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:06:07,262 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:07,263 INFO L225 Difference]: With dead ends: 571 [2022-02-10 03:06:07,263 INFO L226 Difference]: Without dead ends: 571 [2022-02-10 03:06:07,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:06:07,263 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:07,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 125 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 381 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-02-10 03:06:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-02-10 03:06:07,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 484. [2022-02-10 03:06:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.540372670807453) internal successors, (1227), 483 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1227 transitions. [2022-02-10 03:06:07,269 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1227 transitions. Word has length 25 [2022-02-10 03:06:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:07,269 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1227 transitions. [2022-02-10 03:06:07,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1227 transitions. [2022-02-10 03:06:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:07,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:07,270 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:07,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-02-10 03:06:07,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-10 03:06:07,470 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1596694403, now seen corresponding path program 105 times [2022-02-10 03:06:07,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:07,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257115839] [2022-02-10 03:06:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:07,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:07,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:07,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257115839] [2022-02-10 03:06:07,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257115839] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:07,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126128236] [2022-02-10 03:06:07,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:07,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:07,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:07,604 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:07,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-10 03:06:07,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:06:07,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:07,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:07,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:07,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:07,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:07,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:07,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:06:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:07,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:08,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:08,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:08,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:08,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:08,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:08,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:08,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126128236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:08,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:08,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:08,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046154544] [2022-02-10 03:06:08,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:08,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:08,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:08,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:08,106 INFO L87 Difference]: Start difference. First operand 484 states and 1227 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:08,209 INFO L93 Difference]: Finished difference Result 539 states and 1341 transitions. [2022-02-10 03:06:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:06:08,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:08,211 INFO L225 Difference]: With dead ends: 539 [2022-02-10 03:06:08,211 INFO L226 Difference]: Without dead ends: 539 [2022-02-10 03:06:08,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:08,211 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:08,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-02-10 03:06:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-02-10 03:06:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 487. [2022-02-10 03:06:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.5246913580246915) internal successors, (1227), 486 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1227 transitions. [2022-02-10 03:06:08,218 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1227 transitions. Word has length 25 [2022-02-10 03:06:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:08,218 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1227 transitions. [2022-02-10 03:06:08,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1227 transitions. [2022-02-10 03:06:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:08,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:08,219 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:08,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:08,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-10 03:06:08,442 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1079658319, now seen corresponding path program 106 times [2022-02-10 03:06:08,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:08,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503353516] [2022-02-10 03:06:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:08,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:08,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:08,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503353516] [2022-02-10 03:06:08,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503353516] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:08,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738612283] [2022-02-10 03:06:08,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:08,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:08,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:08,553 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:08,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-10 03:06:08,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:08,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:08,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:08,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:08,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:08,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-02-10 03:06:08,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:08,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2022-02-10 03:06:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:08,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:08,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:08,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:08,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:08,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:08,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:08,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:08,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738612283] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:08,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:08,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:06:08,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048859872] [2022-02-10 03:06:08,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:08,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:08,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:08,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:08,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:08,997 INFO L87 Difference]: Start difference. First operand 487 states and 1227 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:09,075 INFO L93 Difference]: Finished difference Result 518 states and 1281 transitions. [2022-02-10 03:06:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:06:09,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:09,076 INFO L225 Difference]: With dead ends: 518 [2022-02-10 03:06:09,076 INFO L226 Difference]: Without dead ends: 514 [2022-02-10 03:06:09,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:09,076 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:09,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 64 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-02-10 03:06:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-10 03:06:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 487. [2022-02-10 03:06:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.522633744855967) internal successors, (1226), 486 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1226 transitions. [2022-02-10 03:06:09,082 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1226 transitions. Word has length 25 [2022-02-10 03:06:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:09,082 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1226 transitions. [2022-02-10 03:06:09,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1226 transitions. [2022-02-10 03:06:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:09,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:09,083 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:09,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-10 03:06:09,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-10 03:06:09,283 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1553201163, now seen corresponding path program 107 times [2022-02-10 03:06:09,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:09,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406159734] [2022-02-10 03:06:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:09,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:09,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:09,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406159734] [2022-02-10 03:06:09,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406159734] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:09,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871297578] [2022-02-10 03:06:09,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:09,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:09,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:09,427 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:09,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-10 03:06:09,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:06:09,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:09,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:09,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:09,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:09,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:09,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:06:09,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:09,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:06:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:09,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:09,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:09,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:10,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:10,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:10,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:10,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:10,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871297578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:10,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:10,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:10,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575292008] [2022-02-10 03:06:10,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:10,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:10,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:10,074 INFO L87 Difference]: Start difference. First operand 487 states and 1226 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:10,337 INFO L93 Difference]: Finished difference Result 573 states and 1388 transitions. [2022-02-10 03:06:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:06:10,337 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:10,338 INFO L225 Difference]: With dead ends: 573 [2022-02-10 03:06:10,338 INFO L226 Difference]: Without dead ends: 573 [2022-02-10 03:06:10,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:06:10,338 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:10,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 162 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 313 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-02-10 03:06:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-02-10 03:06:10,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 489. [2022-02-10 03:06:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.526639344262295) internal successors, (1233), 488 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:10,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1233 transitions. [2022-02-10 03:06:10,344 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1233 transitions. Word has length 25 [2022-02-10 03:06:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:10,344 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1233 transitions. [2022-02-10 03:06:10,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1233 transitions. [2022-02-10 03:06:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:10,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:10,344 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:10,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-02-10 03:06:10,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:10,545 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:10,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1958475481, now seen corresponding path program 108 times [2022-02-10 03:06:10,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:10,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426619292] [2022-02-10 03:06:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:10,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:10,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:10,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426619292] [2022-02-10 03:06:10,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426619292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:10,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286130099] [2022-02-10 03:06:10,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:10,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:10,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:10,705 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:10,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-10 03:06:10,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:06:10,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:10,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:10,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:10,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:10,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:10,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:10,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:10,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:10,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:11,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:11,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:11,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:11,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:11,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:11,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:11,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:11,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286130099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:11,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:11,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:11,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969011305] [2022-02-10 03:06:11,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:11,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:11,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:11,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:11,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:11,304 INFO L87 Difference]: Start difference. First operand 489 states and 1233 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:11,545 INFO L93 Difference]: Finished difference Result 587 states and 1420 transitions. [2022-02-10 03:06:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:11,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:11,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:11,547 INFO L225 Difference]: With dead ends: 587 [2022-02-10 03:06:11,547 INFO L226 Difference]: Without dead ends: 587 [2022-02-10 03:06:11,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:06:11,547 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:11,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 138 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 387 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-02-10 03:06:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-02-10 03:06:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 494. [2022-02-10 03:06:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.5436105476673427) internal successors, (1254), 493 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1254 transitions. [2022-02-10 03:06:11,554 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1254 transitions. Word has length 25 [2022-02-10 03:06:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:11,555 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1254 transitions. [2022-02-10 03:06:11,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1254 transitions. [2022-02-10 03:06:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:11,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:11,555 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:11,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:11,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-02-10 03:06:11,756 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1810942207, now seen corresponding path program 109 times [2022-02-10 03:06:11,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:11,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263155209] [2022-02-10 03:06:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:11,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:11,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:11,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263155209] [2022-02-10 03:06:11,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263155209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:11,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712771445] [2022-02-10 03:06:11,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:11,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:11,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:11,908 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:11,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-10 03:06:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:11,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:12,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:12,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:12,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:12,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2022-02-10 03:06:12,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:12,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-02-10 03:06:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:12,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:12,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:12,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:12,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:12,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:12,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:12,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:12,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712771445] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:12,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:12,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:06:12,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869587001] [2022-02-10 03:06:12,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:12,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:12,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:12,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:12,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:12,572 INFO L87 Difference]: Start difference. First operand 494 states and 1254 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:12,670 INFO L93 Difference]: Finished difference Result 529 states and 1303 transitions. [2022-02-10 03:06:12,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:12,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:12,671 INFO L225 Difference]: With dead ends: 529 [2022-02-10 03:06:12,671 INFO L226 Difference]: Without dead ends: 521 [2022-02-10 03:06:12,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:12,671 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:12,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 99 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 261 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-02-10 03:06:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-10 03:06:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 489. [2022-02-10 03:06:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.526639344262295) internal successors, (1233), 488 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1233 transitions. [2022-02-10 03:06:12,676 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1233 transitions. Word has length 25 [2022-02-10 03:06:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:12,676 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1233 transitions. [2022-02-10 03:06:12,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1233 transitions. [2022-02-10 03:06:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:12,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:12,677 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:12,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-10 03:06:12,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-02-10 03:06:12,877 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:12,878 INFO L85 PathProgramCache]: Analyzing trace with hash 906623, now seen corresponding path program 110 times [2022-02-10 03:06:12,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:12,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42929644] [2022-02-10 03:06:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:12,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:13,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:13,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42929644] [2022-02-10 03:06:13,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42929644] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:13,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885431431] [2022-02-10 03:06:13,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:13,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:13,014 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:13,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-10 03:06:13,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:13,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:13,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:13,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:13,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:13,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:13,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:13,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:13,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:13,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:13,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:06:13,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:13,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:13,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:13,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:06:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:13,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885431431] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:13,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:13,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:13,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286081510] [2022-02-10 03:06:13,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:13,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:13,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:13,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:13,673 INFO L87 Difference]: Start difference. First operand 489 states and 1233 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:13,856 INFO L93 Difference]: Finished difference Result 561 states and 1375 transitions. [2022-02-10 03:06:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:13,857 INFO L225 Difference]: With dead ends: 561 [2022-02-10 03:06:13,857 INFO L226 Difference]: Without dead ends: 561 [2022-02-10 03:06:13,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:06:13,858 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:13,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 111 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 288 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-02-10 03:06:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-02-10 03:06:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 497. [2022-02-10 03:06:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.5443548387096775) internal successors, (1262), 496 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1262 transitions. [2022-02-10 03:06:13,863 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1262 transitions. Word has length 25 [2022-02-10 03:06:13,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:13,863 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1262 transitions. [2022-02-10 03:06:13,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1262 transitions. [2022-02-10 03:06:13,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:13,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:13,864 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:13,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-10 03:06:14,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-02-10 03:06:14,064 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2082317339, now seen corresponding path program 111 times [2022-02-10 03:06:14,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:14,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647367431] [2022-02-10 03:06:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:14,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:14,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:14,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647367431] [2022-02-10 03:06:14,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647367431] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:14,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307728985] [2022-02-10 03:06:14,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:14,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:14,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:14,216 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:14,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-10 03:06:14,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:06:14,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:14,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:14,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:14,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:14,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:14,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:14,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:14,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:14,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:14,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:14,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:14,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:14,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:14,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:14,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:14,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:14,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307728985] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:14,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:14,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:06:14,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360543801] [2022-02-10 03:06:14,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:14,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:14,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:14,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:14,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:14,736 INFO L87 Difference]: Start difference. First operand 497 states and 1262 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:14,978 INFO L93 Difference]: Finished difference Result 539 states and 1343 transitions. [2022-02-10 03:06:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:14,979 INFO L225 Difference]: With dead ends: 539 [2022-02-10 03:06:14,979 INFO L226 Difference]: Without dead ends: 535 [2022-02-10 03:06:14,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:14,979 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:14,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 96 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 299 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-02-10 03:06:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-10 03:06:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 497. [2022-02-10 03:06:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.5423387096774195) internal successors, (1261), 496 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1261 transitions. [2022-02-10 03:06:14,986 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1261 transitions. Word has length 25 [2022-02-10 03:06:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:14,986 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1261 transitions. [2022-02-10 03:06:14,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1261 transitions. [2022-02-10 03:06:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:14,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:14,987 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:15,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-02-10 03:06:15,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-02-10 03:06:15,210 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:15,211 INFO L85 PathProgramCache]: Analyzing trace with hash -294355107, now seen corresponding path program 112 times [2022-02-10 03:06:15,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:15,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237235901] [2022-02-10 03:06:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:15,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:15,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:15,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237235901] [2022-02-10 03:06:15,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237235901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:15,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434288775] [2022-02-10 03:06:15,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:15,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:15,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:15,388 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:15,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-10 03:06:15,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:15,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:15,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:15,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:15,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:15,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:15,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:15,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:15,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:15,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:15,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:15,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:06:15,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:15,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:15,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:15,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:06:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:16,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434288775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:16,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:16,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:16,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722421869] [2022-02-10 03:06:16,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:16,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:16,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:16,057 INFO L87 Difference]: Start difference. First operand 497 states and 1261 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:16,378 INFO L93 Difference]: Finished difference Result 560 states and 1384 transitions. [2022-02-10 03:06:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:16,378 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:16,379 INFO L225 Difference]: With dead ends: 560 [2022-02-10 03:06:16,379 INFO L226 Difference]: Without dead ends: 560 [2022-02-10 03:06:16,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:16,379 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:16,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 135 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 421 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-02-10 03:06:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-02-10 03:06:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 489. [2022-02-10 03:06:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.526639344262295) internal successors, (1233), 488 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1233 transitions. [2022-02-10 03:06:16,385 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1233 transitions. Word has length 25 [2022-02-10 03:06:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:16,385 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1233 transitions. [2022-02-10 03:06:16,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1233 transitions. [2022-02-10 03:06:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:16,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:16,386 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:16,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-10 03:06:16,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:16,586 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:16,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash 95186171, now seen corresponding path program 113 times [2022-02-10 03:06:16,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:16,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192990798] [2022-02-10 03:06:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:16,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:16,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:16,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192990798] [2022-02-10 03:06:16,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192990798] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:16,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135306207] [2022-02-10 03:06:16,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:16,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:16,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:16,707 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:16,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-10 03:06:16,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:06:16,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:16,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:16,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:16,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:16,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:17,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:06:17,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:17,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:06:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:17,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:17,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:17,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-10 03:06:17,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:17,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:06:17,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:17,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:06:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:17,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135306207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:17,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:17,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:06:17,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605162552] [2022-02-10 03:06:17,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:17,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:17,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:17,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:17,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:17,266 INFO L87 Difference]: Start difference. First operand 489 states and 1233 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:17,366 INFO L93 Difference]: Finished difference Result 522 states and 1286 transitions. [2022-02-10 03:06:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:17,367 INFO L225 Difference]: With dead ends: 522 [2022-02-10 03:06:17,367 INFO L226 Difference]: Without dead ends: 514 [2022-02-10 03:06:17,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:17,367 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:17,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 95 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-02-10 03:06:17,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-10 03:06:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 489. [2022-02-10 03:06:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.5245901639344264) internal successors, (1232), 488 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1232 transitions. [2022-02-10 03:06:17,372 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1232 transitions. Word has length 25 [2022-02-10 03:06:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:17,372 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1232 transitions. [2022-02-10 03:06:17,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1232 transitions. [2022-02-10 03:06:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:17,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:17,373 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:17,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-10 03:06:17,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:17,574 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash 434929671, now seen corresponding path program 114 times [2022-02-10 03:06:17,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:17,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769618952] [2022-02-10 03:06:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:17,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:17,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:17,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769618952] [2022-02-10 03:06:17,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769618952] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:17,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138455089] [2022-02-10 03:06:17,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:17,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:17,732 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:17,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-10 03:06:17,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:06:17,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:17,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:17,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:17,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:18,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:18,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:18,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:18,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:06:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:18,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:18,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:18,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:06:18,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:18,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:18,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:18,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:06:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:18,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138455089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:18,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:18,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:18,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402917379] [2022-02-10 03:06:18,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:18,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:18,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:18,391 INFO L87 Difference]: Start difference. First operand 489 states and 1232 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:18,624 INFO L93 Difference]: Finished difference Result 534 states and 1319 transitions. [2022-02-10 03:06:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:18,626 INFO L225 Difference]: With dead ends: 534 [2022-02-10 03:06:18,626 INFO L226 Difference]: Without dead ends: 534 [2022-02-10 03:06:18,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:06:18,626 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:18,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 84 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 198 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2022-02-10 03:06:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-02-10 03:06:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 490. [2022-02-10 03:06:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.5276073619631902) internal successors, (1236), 489 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1236 transitions. [2022-02-10 03:06:18,631 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1236 transitions. Word has length 25 [2022-02-10 03:06:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:18,631 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1236 transitions. [2022-02-10 03:06:18,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1236 transitions. [2022-02-10 03:06:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:18,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:18,632 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:18,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-10 03:06:18,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:18,833 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash -609495305, now seen corresponding path program 115 times [2022-02-10 03:06:18,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:18,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215586782] [2022-02-10 03:06:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:18,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:18,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:18,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215586782] [2022-02-10 03:06:18,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215586782] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:18,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607658572] [2022-02-10 03:06:18,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:18,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:18,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:18,962 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:18,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-10 03:06:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:18,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:18,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:19,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:19,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:19,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:19,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:19,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:19,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:19,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:19,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:19,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:19,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:19,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:19,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:19,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:19,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607658572] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:19,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:19,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:19,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51379629] [2022-02-10 03:06:19,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:19,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:19,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:19,599 INFO L87 Difference]: Start difference. First operand 490 states and 1236 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:19,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:19,838 INFO L93 Difference]: Finished difference Result 587 states and 1430 transitions. [2022-02-10 03:06:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:06:19,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:19,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:19,840 INFO L225 Difference]: With dead ends: 587 [2022-02-10 03:06:19,840 INFO L226 Difference]: Without dead ends: 587 [2022-02-10 03:06:19,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:06:19,840 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:19,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 134 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 362 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-02-10 03:06:19,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-02-10 03:06:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 505. [2022-02-10 03:06:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.5555555555555554) internal successors, (1288), 504 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1288 transitions. [2022-02-10 03:06:19,845 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1288 transitions. Word has length 25 [2022-02-10 03:06:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:19,845 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1288 transitions. [2022-02-10 03:06:19,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1288 transitions. [2022-02-10 03:06:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:19,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:19,846 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:19,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-02-10 03:06:20,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-10 03:06:20,047 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash 180898815, now seen corresponding path program 116 times [2022-02-10 03:06:20,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:20,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150893535] [2022-02-10 03:06:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:20,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:06:20,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:20,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150893535] [2022-02-10 03:06:20,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150893535] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:20,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434983712] [2022-02-10 03:06:20,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:20,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:20,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:20,177 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:20,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-10 03:06:20,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:20,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:20,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:20,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:20,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:20,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:20,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:20,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:20,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:20,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:06:20,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:20,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:20,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:20,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:20,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:20,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:20,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:06:20,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434983712] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:20,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:20,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:20,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475947802] [2022-02-10 03:06:20,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:20,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:20,785 INFO L87 Difference]: Start difference. First operand 505 states and 1288 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:21,067 INFO L93 Difference]: Finished difference Result 592 states and 1441 transitions. [2022-02-10 03:06:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:06:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:21,068 INFO L225 Difference]: With dead ends: 592 [2022-02-10 03:06:21,068 INFO L226 Difference]: Without dead ends: 592 [2022-02-10 03:06:21,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:06:21,069 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:21,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 113 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 284 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-02-10 03:06:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-10 03:06:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 501. [2022-02-10 03:06:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.55) internal successors, (1275), 500 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1275 transitions. [2022-02-10 03:06:21,075 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1275 transitions. Word has length 25 [2022-02-10 03:06:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:21,075 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1275 transitions. [2022-02-10 03:06:21,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1275 transitions. [2022-02-10 03:06:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:21,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:21,075 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:21,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:21,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-10 03:06:21,276 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash -904757035, now seen corresponding path program 117 times [2022-02-10 03:06:21,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:21,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785144094] [2022-02-10 03:06:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:21,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:21,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:21,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785144094] [2022-02-10 03:06:21,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785144094] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:21,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951243251] [2022-02-10 03:06:21,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:21,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:21,407 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:21,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-10 03:06:21,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:06:21,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:21,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:21,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:21,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:21,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:21,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:21,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:21,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:21,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:21,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:21,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:21,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:21,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:21,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:21,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:22,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951243251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:22,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:22,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:22,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883790721] [2022-02-10 03:06:22,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:22,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:22,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:22,005 INFO L87 Difference]: Start difference. First operand 501 states and 1275 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:22,358 INFO L93 Difference]: Finished difference Result 608 states and 1465 transitions. [2022-02-10 03:06:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:06:22,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:22,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:22,360 INFO L225 Difference]: With dead ends: 608 [2022-02-10 03:06:22,360 INFO L226 Difference]: Without dead ends: 608 [2022-02-10 03:06:22,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:06:22,360 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:22,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 147 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 420 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-02-10 03:06:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-02-10 03:06:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 493. [2022-02-10 03:06:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.5345528455284554) internal successors, (1247), 492 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1247 transitions. [2022-02-10 03:06:22,365 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1247 transitions. Word has length 25 [2022-02-10 03:06:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:22,365 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1247 transitions. [2022-02-10 03:06:22,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1247 transitions. [2022-02-10 03:06:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:22,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:22,366 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:22,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:22,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-10 03:06:22,567 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:22,567 INFO L85 PathProgramCache]: Analyzing trace with hash -175472257, now seen corresponding path program 118 times [2022-02-10 03:06:22,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:22,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036821735] [2022-02-10 03:06:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:22,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:22,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:22,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036821735] [2022-02-10 03:06:22,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036821735] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:22,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611573519] [2022-02-10 03:06:22,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:22,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:22,730 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:22,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-10 03:06:22,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:22,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:22,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:22,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:22,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:23,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:23,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:23,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:23,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:06:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:23,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:23,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:23,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:23,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:23,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:23,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:23,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:23,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611573519] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:23,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:23,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:23,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665815552] [2022-02-10 03:06:23,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:23,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:23,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:23,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:23,349 INFO L87 Difference]: Start difference. First operand 493 states and 1247 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:23,617 INFO L93 Difference]: Finished difference Result 568 states and 1396 transitions. [2022-02-10 03:06:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:06:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:23,618 INFO L225 Difference]: With dead ends: 568 [2022-02-10 03:06:23,618 INFO L226 Difference]: Without dead ends: 568 [2022-02-10 03:06:23,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:06:23,619 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:23,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 134 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 305 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-02-10 03:06:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-02-10 03:06:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 505. [2022-02-10 03:06:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.5734126984126986) internal successors, (1297), 504 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1297 transitions. [2022-02-10 03:06:23,624 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1297 transitions. Word has length 25 [2022-02-10 03:06:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:23,624 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1297 transitions. [2022-02-10 03:06:23,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1297 transitions. [2022-02-10 03:06:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:23,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:23,625 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:23,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-10 03:06:23,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-10 03:06:23,825 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash -930893335, now seen corresponding path program 119 times [2022-02-10 03:06:23,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:23,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047884958] [2022-02-10 03:06:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:23,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:23,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:23,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047884958] [2022-02-10 03:06:23,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047884958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:23,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970741802] [2022-02-10 03:06:23,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:23,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:23,960 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:23,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-10 03:06:23,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:06:23,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:23,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:24,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:24,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:24,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:24,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:24,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:24,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:24,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:24,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:24,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:24,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:24,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:24,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:24,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970741802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:24,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:24,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:24,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224537821] [2022-02-10 03:06:24,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:24,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:24,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:24,617 INFO L87 Difference]: Start difference. First operand 505 states and 1297 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:24,927 INFO L93 Difference]: Finished difference Result 663 states and 1607 transitions. [2022-02-10 03:06:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:06:24,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:24,928 INFO L225 Difference]: With dead ends: 663 [2022-02-10 03:06:24,928 INFO L226 Difference]: Without dead ends: 663 [2022-02-10 03:06:24,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:24,928 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:24,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 168 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 469 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-02-10 03:06:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-02-10 03:06:24,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 529. [2022-02-10 03:06:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.628787878787879) internal successors, (1388), 528 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1388 transitions. [2022-02-10 03:06:24,934 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1388 transitions. Word has length 25 [2022-02-10 03:06:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:24,935 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1388 transitions. [2022-02-10 03:06:24,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:24,935 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1388 transitions. [2022-02-10 03:06:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:24,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:24,936 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:24,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-02-10 03:06:25,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-10 03:06:25,138 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1226155065, now seen corresponding path program 120 times [2022-02-10 03:06:25,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:25,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916059338] [2022-02-10 03:06:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:25,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:25,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:25,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916059338] [2022-02-10 03:06:25,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916059338] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:25,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370986041] [2022-02-10 03:06:25,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:25,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:25,263 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:25,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-10 03:06:25,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:06:25,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:25,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:25,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:25,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:25,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:25,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:25,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:25,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:25,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:25,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:25,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:25,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:25,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:25,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:25,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:25,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370986041] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:25,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:25,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:25,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882380577] [2022-02-10 03:06:25,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:25,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:25,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:25,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:25,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:25,810 INFO L87 Difference]: Start difference. First operand 529 states and 1388 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:26,109 INFO L93 Difference]: Finished difference Result 654 states and 1594 transitions. [2022-02-10 03:06:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:06:26,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:26,111 INFO L225 Difference]: With dead ends: 654 [2022-02-10 03:06:26,111 INFO L226 Difference]: Without dead ends: 654 [2022-02-10 03:06:26,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:26,111 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:26,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 182 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 519 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-02-10 03:06:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-02-10 03:06:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 515. [2022-02-10 03:06:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.605058365758755) internal successors, (1339), 514 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1339 transitions. [2022-02-10 03:06:26,118 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1339 transitions. Word has length 25 [2022-02-10 03:06:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:26,118 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1339 transitions. [2022-02-10 03:06:26,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1339 transitions. [2022-02-10 03:06:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:26,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:26,119 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:26,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-10 03:06:26,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:26,327 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash -525619017, now seen corresponding path program 121 times [2022-02-10 03:06:26,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:26,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069048683] [2022-02-10 03:06:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:26,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:26,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:26,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069048683] [2022-02-10 03:06:26,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069048683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:26,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733642746] [2022-02-10 03:06:26,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:26,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:26,461 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:26,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-10 03:06:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:26,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:26,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:26,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:26,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:26,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:26,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:26,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:06:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:26,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:26,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:26,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:26,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:26,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:26,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:26,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:27,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733642746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:27,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:27,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:27,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618971203] [2022-02-10 03:06:27,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:27,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:27,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:27,044 INFO L87 Difference]: Start difference. First operand 515 states and 1339 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:27,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:27,299 INFO L93 Difference]: Finished difference Result 639 states and 1565 transitions. [2022-02-10 03:06:27,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:06:27,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:27,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:27,301 INFO L225 Difference]: With dead ends: 639 [2022-02-10 03:06:27,301 INFO L226 Difference]: Without dead ends: 639 [2022-02-10 03:06:27,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:27,301 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:27,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 157 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 392 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-02-10 03:06:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-10 03:06:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 525. [2022-02-10 03:06:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.601145038167939) internal successors, (1363), 524 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1363 transitions. [2022-02-10 03:06:27,307 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1363 transitions. Word has length 25 [2022-02-10 03:06:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:27,307 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1363 transitions. [2022-02-10 03:06:27,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1363 transitions. [2022-02-10 03:06:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:27,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:27,308 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:27,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-02-10 03:06:27,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:27,508 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:27,509 INFO L85 PathProgramCache]: Analyzing trace with hash 324049795, now seen corresponding path program 122 times [2022-02-10 03:06:27,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:27,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373680380] [2022-02-10 03:06:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:27,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:27,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:27,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373680380] [2022-02-10 03:06:27,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373680380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:27,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042089738] [2022-02-10 03:06:27,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:27,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:27,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:27,621 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:27,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-10 03:06:27,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:27,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:27,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:27,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:27,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:28,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:28,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:06:28,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:28,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-10 03:06:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:28,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:28,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:28,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:28,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:28,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:28,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:28,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:28,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042089738] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:28,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:28,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:28,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525494322] [2022-02-10 03:06:28,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:28,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:28,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:28,310 INFO L87 Difference]: Start difference. First operand 525 states and 1363 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:28,553 INFO L93 Difference]: Finished difference Result 642 states and 1649 transitions. [2022-02-10 03:06:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:06:28,554 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:28,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:28,555 INFO L225 Difference]: With dead ends: 642 [2022-02-10 03:06:28,555 INFO L226 Difference]: Without dead ends: 642 [2022-02-10 03:06:28,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:06:28,555 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:28,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 155 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 432 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-02-10 03:06:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-10 03:06:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 539. [2022-02-10 03:06:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.643122676579926) internal successors, (1422), 538 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1422 transitions. [2022-02-10 03:06:28,562 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1422 transitions. Word has length 25 [2022-02-10 03:06:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:28,562 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1422 transitions. [2022-02-10 03:06:28,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1422 transitions. [2022-02-10 03:06:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:28,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:28,563 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:28,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-02-10 03:06:28,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-02-10 03:06:28,764 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash -943536261, now seen corresponding path program 123 times [2022-02-10 03:06:28,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:28,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568214591] [2022-02-10 03:06:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:28,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:06:28,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:28,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568214591] [2022-02-10 03:06:28,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568214591] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:28,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379823664] [2022-02-10 03:06:28,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:28,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:28,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:28,880 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:28,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-10 03:06:28,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:06:28,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:28,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:28,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:29,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:29,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:29,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:29,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:06:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:06:29,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:29,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:29,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:29,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:29,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:29,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:29,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:06:29,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379823664] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:29,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:29,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:29,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856685907] [2022-02-10 03:06:29,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:29,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:29,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:29,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:29,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:29,530 INFO L87 Difference]: Start difference. First operand 539 states and 1422 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:29,734 INFO L93 Difference]: Finished difference Result 631 states and 1607 transitions. [2022-02-10 03:06:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:06:29,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:29,736 INFO L225 Difference]: With dead ends: 631 [2022-02-10 03:06:29,736 INFO L226 Difference]: Without dead ends: 631 [2022-02-10 03:06:29,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:06:29,736 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:29,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 115 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 306 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-02-10 03:06:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-02-10 03:06:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 520. [2022-02-10 03:06:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.603082851637765) internal successors, (1351), 519 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1351 transitions. [2022-02-10 03:06:29,742 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1351 transitions. Word has length 25 [2022-02-10 03:06:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:29,742 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1351 transitions. [2022-02-10 03:06:29,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:29,742 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1351 transitions. [2022-02-10 03:06:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:29,743 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:29,743 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:29,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-02-10 03:06:29,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:29,944 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash -239129243, now seen corresponding path program 124 times [2022-02-10 03:06:29,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:29,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413233087] [2022-02-10 03:06:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:29,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:30,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:30,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413233087] [2022-02-10 03:06:30,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413233087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:30,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295428208] [2022-02-10 03:06:30,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:30,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:30,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:30,066 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:30,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-10 03:06:30,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:30,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:30,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:30,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:30,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:30,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:30,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:06:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:30,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:30,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:30,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:30,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:30,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:30,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:30,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:30,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295428208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:30,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:30,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:30,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76180024] [2022-02-10 03:06:30,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:30,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:30,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:30,640 INFO L87 Difference]: Start difference. First operand 520 states and 1351 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:30,908 INFO L93 Difference]: Finished difference Result 611 states and 1534 transitions. [2022-02-10 03:06:30,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:06:30,908 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:30,909 INFO L225 Difference]: With dead ends: 611 [2022-02-10 03:06:30,909 INFO L226 Difference]: Without dead ends: 611 [2022-02-10 03:06:30,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:30,910 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:30,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 142 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 401 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-02-10 03:06:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-10 03:06:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 515. [2022-02-10 03:06:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.595330739299611) internal successors, (1334), 514 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1334 transitions. [2022-02-10 03:06:30,917 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1334 transitions. Word has length 25 [2022-02-10 03:06:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:30,917 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1334 transitions. [2022-02-10 03:06:30,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1334 transitions. [2022-02-10 03:06:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:30,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:30,918 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:30,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:31,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:31,139 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:31,140 INFO L85 PathProgramCache]: Analyzing trace with hash -992476029, now seen corresponding path program 125 times [2022-02-10 03:06:31,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:31,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715887126] [2022-02-10 03:06:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:31,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:31,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:31,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715887126] [2022-02-10 03:06:31,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715887126] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:31,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822278884] [2022-02-10 03:06:31,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:31,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:31,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:31,256 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:31,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-10 03:06:31,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:06:31,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:31,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:31,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:31,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:31,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:31,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:31,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:06:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:31,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:31,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:31,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:31,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:31,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:31,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:31,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:31,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822278884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:31,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:31,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:31,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719388559] [2022-02-10 03:06:31,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:31,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:31,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:31,843 INFO L87 Difference]: Start difference. First operand 515 states and 1334 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:32,029 INFO L93 Difference]: Finished difference Result 659 states and 1621 transitions. [2022-02-10 03:06:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:06:32,029 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:32,030 INFO L225 Difference]: With dead ends: 659 [2022-02-10 03:06:32,031 INFO L226 Difference]: Without dead ends: 659 [2022-02-10 03:06:32,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:06:32,031 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:32,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 127 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 299 Invalid, 0 Unknown, 168 Unchecked, 0.1s Time] [2022-02-10 03:06:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-10 03:06:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 512. [2022-02-10 03:06:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 2.5870841487279845) internal successors, (1322), 511 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1322 transitions. [2022-02-10 03:06:32,037 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1322 transitions. Word has length 25 [2022-02-10 03:06:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:32,037 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1322 transitions. [2022-02-10 03:06:32,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1322 transitions. [2022-02-10 03:06:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:32,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:32,038 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:32,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-02-10 03:06:32,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:32,238 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:32,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:32,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1402410873, now seen corresponding path program 126 times [2022-02-10 03:06:32,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:32,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392503790] [2022-02-10 03:06:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:32,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:32,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:32,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392503790] [2022-02-10 03:06:32,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392503790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:32,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902293443] [2022-02-10 03:06:32,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:32,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:32,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:32,402 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:32,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-10 03:06:32,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:06:32,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:32,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:32,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:32,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:06:32,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:32,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:06:32,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:32,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:06:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:32,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:32,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:32,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:06:32,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:32,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:32,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:32,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:06:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:32,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902293443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:32,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:32,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:06:32,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316461614] [2022-02-10 03:06:32,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:32,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:32,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:32,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:32,873 INFO L87 Difference]: Start difference. First operand 512 states and 1322 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:33,154 INFO L93 Difference]: Finished difference Result 541 states and 1366 transitions. [2022-02-10 03:06:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:33,155 INFO L225 Difference]: With dead ends: 541 [2022-02-10 03:06:33,155 INFO L226 Difference]: Without dead ends: 539 [2022-02-10 03:06:33,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:06:33,155 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:33,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 96 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 338 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-02-10 03:06:33,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-02-10 03:06:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 515. [2022-02-10 03:06:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.577821011673152) internal successors, (1325), 514 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1325 transitions. [2022-02-10 03:06:33,160 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1325 transitions. Word has length 25 [2022-02-10 03:06:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:33,160 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1325 transitions. [2022-02-10 03:06:33,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1325 transitions. [2022-02-10 03:06:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:33,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:33,161 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:33,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-02-10 03:06:33,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:33,362 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:33,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:33,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1954431701, now seen corresponding path program 127 times [2022-02-10 03:06:33,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:33,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479452656] [2022-02-10 03:06:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:33,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:33,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:33,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479452656] [2022-02-10 03:06:33,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479452656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:33,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981701238] [2022-02-10 03:06:33,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:33,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:33,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:33,477 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:33,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-10 03:06:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:33,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:33,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:06:33,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:33,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:06:33,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:33,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:06:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:33,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:33,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:33,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:06:33,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:33,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2022-02-10 03:06:33,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:33,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-10 03:06:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:33,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981701238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:33,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:33,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:06:33,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213086809] [2022-02-10 03:06:33,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:33,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:06:33,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:06:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:06:33,916 INFO L87 Difference]: Start difference. First operand 515 states and 1325 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:34,064 INFO L93 Difference]: Finished difference Result 558 states and 1387 transitions. [2022-02-10 03:06:34,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:34,065 INFO L225 Difference]: With dead ends: 558 [2022-02-10 03:06:34,065 INFO L226 Difference]: Without dead ends: 554 [2022-02-10 03:06:34,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:34,065 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:34,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 66 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-02-10 03:06:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-02-10 03:06:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 520. [2022-02-10 03:06:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.5645472061657033) internal successors, (1331), 519 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1331 transitions. [2022-02-10 03:06:34,070 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1331 transitions. Word has length 25 [2022-02-10 03:06:34,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:34,070 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1331 transitions. [2022-02-10 03:06:34,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1331 transitions. [2022-02-10 03:06:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:34,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:34,071 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:34,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:34,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-10 03:06:34,272 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash -479705481, now seen corresponding path program 128 times [2022-02-10 03:06:34,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:34,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671482503] [2022-02-10 03:06:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:34,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:34,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:34,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671482503] [2022-02-10 03:06:34,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671482503] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:34,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60196273] [2022-02-10 03:06:34,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:34,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:34,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:34,398 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:34,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-10 03:06:34,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:34,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:34,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:34,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:34,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:34,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:06:34,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:34,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:06:34,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:34,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:06:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:34,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:34,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:34,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:06:34,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:34,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:34,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:34,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:06:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:34,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60196273] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:34,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:34,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:06:34,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693767437] [2022-02-10 03:06:34,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:34,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:34,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:34,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:34,780 INFO L87 Difference]: Start difference. First operand 520 states and 1331 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:35,034 INFO L93 Difference]: Finished difference Result 546 states and 1369 transitions. [2022-02-10 03:06:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:35,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:35,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:35,035 INFO L225 Difference]: With dead ends: 546 [2022-02-10 03:06:35,035 INFO L226 Difference]: Without dead ends: 536 [2022-02-10 03:06:35,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:35,035 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:35,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 80 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 304 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-02-10 03:06:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-02-10 03:06:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 512. [2022-02-10 03:06:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 2.5851272015655575) internal successors, (1321), 511 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1321 transitions. [2022-02-10 03:06:35,040 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1321 transitions. Word has length 25 [2022-02-10 03:06:35,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:35,040 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1321 transitions. [2022-02-10 03:06:35,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1321 transitions. [2022-02-10 03:06:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:35,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:35,041 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:35,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-02-10 03:06:35,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-10 03:06:35,243 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:35,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:35,243 INFO L85 PathProgramCache]: Analyzing trace with hash 720467207, now seen corresponding path program 129 times [2022-02-10 03:06:35,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:35,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600263304] [2022-02-10 03:06:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:35,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:35,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:35,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600263304] [2022-02-10 03:06:35,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600263304] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:35,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330922141] [2022-02-10 03:06:35,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:35,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:35,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:35,372 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:35,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-10 03:06:35,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:06:35,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:35,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:35,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:35,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:35,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:35,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:35,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:06:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:35,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:35,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:35,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:35,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:35,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:35,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:35,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:35,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330922141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:35,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:35,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:35,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046517329] [2022-02-10 03:06:35,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:35,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:35,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:35,875 INFO L87 Difference]: Start difference. First operand 512 states and 1321 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:36,142 INFO L93 Difference]: Finished difference Result 592 states and 1501 transitions. [2022-02-10 03:06:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:36,143 INFO L225 Difference]: With dead ends: 592 [2022-02-10 03:06:36,143 INFO L226 Difference]: Without dead ends: 592 [2022-02-10 03:06:36,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:06:36,144 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:36,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 159 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 523 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-02-10 03:06:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-10 03:06:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 513. [2022-02-10 03:06:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.5859375) internal successors, (1324), 512 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1324 transitions. [2022-02-10 03:06:36,149 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1324 transitions. Word has length 25 [2022-02-10 03:06:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:36,149 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1324 transitions. [2022-02-10 03:06:36,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1324 transitions. [2022-02-10 03:06:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:36,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:36,150 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:36,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-02-10 03:06:36,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-02-10 03:06:36,351 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:36,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1506682237, now seen corresponding path program 130 times [2022-02-10 03:06:36,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:36,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788781216] [2022-02-10 03:06:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:36,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:36,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:36,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788781216] [2022-02-10 03:06:36,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788781216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:36,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566785774] [2022-02-10 03:06:36,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:36,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:36,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:36,442 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:36,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-10 03:06:36,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:36,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:36,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:36,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:36,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:06:36,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:06:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:36,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:36,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:36,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:36,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:36,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:36,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:36,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:36,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566785774] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:36,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:36,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:06:36,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948398813] [2022-02-10 03:06:36,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:36,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:36,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:36,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:36,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:36,787 INFO L87 Difference]: Start difference. First operand 513 states and 1324 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:36,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:36,953 INFO L93 Difference]: Finished difference Result 550 states and 1402 transitions. [2022-02-10 03:06:36,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:36,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:36,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:36,955 INFO L225 Difference]: With dead ends: 550 [2022-02-10 03:06:36,955 INFO L226 Difference]: Without dead ends: 550 [2022-02-10 03:06:36,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:36,955 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:36,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:06:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-02-10 03:06:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 515. [2022-02-10 03:06:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.587548638132296) internal successors, (1330), 514 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1330 transitions. [2022-02-10 03:06:36,960 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1330 transitions. Word has length 25 [2022-02-10 03:06:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:36,960 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1330 transitions. [2022-02-10 03:06:36,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1330 transitions. [2022-02-10 03:06:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:36,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:36,961 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:36,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-02-10 03:06:37,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:37,174 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1801943967, now seen corresponding path program 131 times [2022-02-10 03:06:37,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:37,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563358896] [2022-02-10 03:06:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:37,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:37,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:37,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563358896] [2022-02-10 03:06:37,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563358896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:37,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708504356] [2022-02-10 03:06:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:37,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:37,291 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:37,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-10 03:06:37,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:06:37,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:37,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:37,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:37,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:37,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:37,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:37,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:37,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:37,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:06:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:37,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:37,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:37,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:37,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:37,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:37,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:37,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:37,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708504356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:37,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:37,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:37,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219031668] [2022-02-10 03:06:37,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:37,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:37,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:37,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:37,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:37,782 INFO L87 Difference]: Start difference. First operand 515 states and 1330 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:38,035 INFO L93 Difference]: Finished difference Result 575 states and 1442 transitions. [2022-02-10 03:06:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:38,037 INFO L225 Difference]: With dead ends: 575 [2022-02-10 03:06:38,037 INFO L226 Difference]: Without dead ends: 575 [2022-02-10 03:06:38,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:38,037 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:38,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 162 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 485 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-02-10 03:06:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-10 03:06:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 514. [2022-02-10 03:06:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 2.586744639376218) internal successors, (1327), 513 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1327 transitions. [2022-02-10 03:06:38,043 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1327 transitions. Word has length 25 [2022-02-10 03:06:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:38,043 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1327 transitions. [2022-02-10 03:06:38,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1327 transitions. [2022-02-10 03:06:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:38,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:38,043 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:38,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:38,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-02-10 03:06:38,244 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:38,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:38,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1072659189, now seen corresponding path program 132 times [2022-02-10 03:06:38,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:38,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257851804] [2022-02-10 03:06:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:38,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:38,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:38,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257851804] [2022-02-10 03:06:38,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257851804] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:38,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371992655] [2022-02-10 03:06:38,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:38,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:38,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:38,370 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:38,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-10 03:06:38,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:06:38,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:38,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:38,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:38,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:38,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:38,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:38,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:06:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:38,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:38,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:38,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:38,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:38,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:38,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:38,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:38,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371992655] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:38,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:38,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:38,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892974764] [2022-02-10 03:06:38,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:38,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:38,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:38,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:38,826 INFO L87 Difference]: Start difference. First operand 514 states and 1327 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:39,003 INFO L93 Difference]: Finished difference Result 575 states and 1443 transitions. [2022-02-10 03:06:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:39,005 INFO L225 Difference]: With dead ends: 575 [2022-02-10 03:06:39,005 INFO L226 Difference]: Without dead ends: 575 [2022-02-10 03:06:39,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:39,005 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:39,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 113 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 362 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-02-10 03:06:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-10 03:06:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 514. [2022-02-10 03:06:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 2.586744639376218) internal successors, (1327), 513 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1327 transitions. [2022-02-10 03:06:39,011 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1327 transitions. Word has length 25 [2022-02-10 03:06:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:39,011 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1327 transitions. [2022-02-10 03:06:39,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1327 transitions. [2022-02-10 03:06:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:39,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:39,011 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:39,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-02-10 03:06:39,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-02-10 03:06:39,212 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1828080267, now seen corresponding path program 133 times [2022-02-10 03:06:39,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:39,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808643341] [2022-02-10 03:06:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:39,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:39,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:39,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808643341] [2022-02-10 03:06:39,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808643341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:39,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400685709] [2022-02-10 03:06:39,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:39,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:39,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:39,297 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:39,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-10 03:06:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:39,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:39,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:39,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:39,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:06:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:39,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:39,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:39,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:39,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:39,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:39,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:39,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:39,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400685709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:39,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:39,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:06:39,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728851829] [2022-02-10 03:06:39,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:39,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:39,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:39,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:39,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:39,690 INFO L87 Difference]: Start difference. First operand 514 states and 1327 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:39,833 INFO L93 Difference]: Finished difference Result 584 states and 1495 transitions. [2022-02-10 03:06:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:06:39,834 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:39,835 INFO L225 Difference]: With dead ends: 584 [2022-02-10 03:06:39,835 INFO L226 Difference]: Without dead ends: 584 [2022-02-10 03:06:39,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:39,835 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:39,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:06:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-02-10 03:06:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 523. [2022-02-10 03:06:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.5957854406130267) internal successors, (1355), 522 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1355 transitions. [2022-02-10 03:06:39,840 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1355 transitions. Word has length 25 [2022-02-10 03:06:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:39,841 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 1355 transitions. [2022-02-10 03:06:39,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1355 transitions. [2022-02-10 03:06:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:39,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:39,841 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:39,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-02-10 03:06:40,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:40,044 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2123341997, now seen corresponding path program 134 times [2022-02-10 03:06:40,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:40,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714318513] [2022-02-10 03:06:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:40,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:40,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:40,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714318513] [2022-02-10 03:06:40,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714318513] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:40,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565290199] [2022-02-10 03:06:40,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:40,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:40,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:40,181 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:40,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-10 03:06:40,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:40,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:40,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:40,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:40,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:40,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:40,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:40,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:06:40,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:40,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:06:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:40,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:40,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:40,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:40,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:40,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:40,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:40,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:40,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565290199] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:40,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:40,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:40,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406062218] [2022-02-10 03:06:40,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:40,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:40,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:40,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:40,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:40,782 INFO L87 Difference]: Start difference. First operand 523 states and 1355 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:40,980 INFO L93 Difference]: Finished difference Result 583 states and 1467 transitions. [2022-02-10 03:06:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:40,982 INFO L225 Difference]: With dead ends: 583 [2022-02-10 03:06:40,982 INFO L226 Difference]: Without dead ends: 583 [2022-02-10 03:06:40,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:40,982 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 82 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:40,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 126 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 315 Invalid, 0 Unknown, 175 Unchecked, 0.1s Time] [2022-02-10 03:06:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-10 03:06:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 522. [2022-02-10 03:06:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 2.595009596928983) internal successors, (1352), 521 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1352 transitions. [2022-02-10 03:06:40,988 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1352 transitions. Word has length 25 [2022-02-10 03:06:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:40,988 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1352 transitions. [2022-02-10 03:06:40,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1352 transitions. [2022-02-10 03:06:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:40,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:40,989 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:41,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-02-10 03:06:41,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:41,211 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash -217572341, now seen corresponding path program 135 times [2022-02-10 03:06:41,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:41,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963955330] [2022-02-10 03:06:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:41,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:41,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:41,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963955330] [2022-02-10 03:06:41,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963955330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:41,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444557196] [2022-02-10 03:06:41,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:41,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:41,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:41,324 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:41,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-10 03:06:41,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:06:41,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:41,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:41,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:41,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:41,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:41,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:41,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:41,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:06:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:41,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:41,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:41,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:41,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:41,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:41,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:41,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:41,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444557196] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:41,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:41,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:41,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638148177] [2022-02-10 03:06:41,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:41,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:41,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:41,868 INFO L87 Difference]: Start difference. First operand 522 states and 1352 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:41,954 INFO L93 Difference]: Finished difference Result 563 states and 1437 transitions. [2022-02-10 03:06:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:41,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:41,955 INFO L225 Difference]: With dead ends: 563 [2022-02-10 03:06:41,955 INFO L226 Difference]: Without dead ends: 563 [2022-02-10 03:06:41,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:41,956 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:41,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 0 Unknown, 144 Unchecked, 0.1s Time] [2022-02-10 03:06:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-10 03:06:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 515. [2022-02-10 03:06:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.587548638132296) internal successors, (1330), 514 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1330 transitions. [2022-02-10 03:06:41,961 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1330 transitions. Word has length 25 [2022-02-10 03:06:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:41,961 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1330 transitions. [2022-02-10 03:06:41,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:41,961 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1330 transitions. [2022-02-10 03:06:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:41,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:41,962 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:41,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-02-10 03:06:42,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:42,163 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash -573137137, now seen corresponding path program 136 times [2022-02-10 03:06:42,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:42,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518455069] [2022-02-10 03:06:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:42,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:42,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:42,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518455069] [2022-02-10 03:06:42,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518455069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:42,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685526208] [2022-02-10 03:06:42,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:42,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:42,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:42,250 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:42,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-10 03:06:42,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:42,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:42,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:42,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:42,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:42,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:42,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:42,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:42,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:42,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:42,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:42,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:42,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685526208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:42,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:42,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:06:42,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121525946] [2022-02-10 03:06:42,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:42,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:06:42,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:42,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:06:42,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:42,680 INFO L87 Difference]: Start difference. First operand 515 states and 1330 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:42,883 INFO L93 Difference]: Finished difference Result 588 states and 1471 transitions. [2022-02-10 03:06:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:06:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:42,884 INFO L225 Difference]: With dead ends: 588 [2022-02-10 03:06:42,884 INFO L226 Difference]: Without dead ends: 576 [2022-02-10 03:06:42,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:42,885 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:42,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 136 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:06:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-02-10 03:06:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 531. [2022-02-10 03:06:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.5943396226415096) internal successors, (1375), 530 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1375 transitions. [2022-02-10 03:06:42,890 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1375 transitions. Word has length 25 [2022-02-10 03:06:42,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:42,890 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1375 transitions. [2022-02-10 03:06:42,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:42,890 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1375 transitions. [2022-02-10 03:06:42,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:42,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:42,891 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:42,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-02-10 03:06:43,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-02-10 03:06:43,093 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:43,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1911794575, now seen corresponding path program 137 times [2022-02-10 03:06:43,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:43,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994461057] [2022-02-10 03:06:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:43,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:43,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:43,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994461057] [2022-02-10 03:06:43,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994461057] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:43,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594183653] [2022-02-10 03:06:43,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:43,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:43,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:43,252 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:43,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-10 03:06:43,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:06:43,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:43,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:43,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:43,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:43,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:06:43,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:43,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:06:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:43,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:43,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:43,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:06:43,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:43,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:43,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:43,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:06:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:44,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594183653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:44,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:44,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:44,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831814857] [2022-02-10 03:06:44,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:44,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:44,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:44,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:44,080 INFO L87 Difference]: Start difference. First operand 531 states and 1375 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:44,246 INFO L93 Difference]: Finished difference Result 568 states and 1442 transitions. [2022-02-10 03:06:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:44,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:44,247 INFO L225 Difference]: With dead ends: 568 [2022-02-10 03:06:44,247 INFO L226 Difference]: Without dead ends: 568 [2022-02-10 03:06:44,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:44,247 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:44,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 118 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 275 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-02-10 03:06:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-02-10 03:06:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 531. [2022-02-10 03:06:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.5943396226415096) internal successors, (1375), 530 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1375 transitions. [2022-02-10 03:06:44,253 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1375 transitions. Word has length 25 [2022-02-10 03:06:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:44,253 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1375 transitions. [2022-02-10 03:06:44,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1375 transitions. [2022-02-10 03:06:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:44,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:44,254 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:44,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-02-10 03:06:44,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-02-10 03:06:44,454 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:44,454 INFO L85 PathProgramCache]: Analyzing trace with hash 260990611, now seen corresponding path program 138 times [2022-02-10 03:06:44,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:44,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796301844] [2022-02-10 03:06:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:44,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:06:44,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:44,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796301844] [2022-02-10 03:06:44,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796301844] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:44,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244211347] [2022-02-10 03:06:44,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:44,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:44,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:44,594 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:44,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-10 03:06:44,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:06:44,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:44,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:44,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:44,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:44,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:44,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:06:44,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:44,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:06:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:06:44,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:45,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:45,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:45,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:45,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:45,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:45,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:06:45,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244211347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:45,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:45,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:45,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143259501] [2022-02-10 03:06:45,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:45,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:45,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:45,194 INFO L87 Difference]: Start difference. First operand 531 states and 1375 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:45,357 INFO L93 Difference]: Finished difference Result 553 states and 1409 transitions. [2022-02-10 03:06:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:45,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:45,358 INFO L225 Difference]: With dead ends: 553 [2022-02-10 03:06:45,358 INFO L226 Difference]: Without dead ends: 553 [2022-02-10 03:06:45,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:06:45,358 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:45,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 132 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 381 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2022-02-10 03:06:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-02-10 03:06:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 515. [2022-02-10 03:06:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.587548638132296) internal successors, (1330), 514 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1330 transitions. [2022-02-10 03:06:45,364 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1330 transitions. Word has length 25 [2022-02-10 03:06:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:45,364 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1330 transitions. [2022-02-10 03:06:45,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1330 transitions. [2022-02-10 03:06:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:45,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:45,364 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:45,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-02-10 03:06:45,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-02-10 03:06:45,565 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash -734608425, now seen corresponding path program 139 times [2022-02-10 03:06:45,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:45,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300599042] [2022-02-10 03:06:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:45,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:45,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:45,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300599042] [2022-02-10 03:06:45,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300599042] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:45,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237933949] [2022-02-10 03:06:45,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:45,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:45,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:45,675 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:45,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-10 03:06:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:45,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:45,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:45,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:45,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-02-10 03:06:45,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:45,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2022-02-10 03:06:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:45,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:46,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:46,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:46,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:46,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:46,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:46,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:46,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237933949] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:46,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:46,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:06:46,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631589334] [2022-02-10 03:06:46,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:46,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:46,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:46,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:46,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:46,143 INFO L87 Difference]: Start difference. First operand 515 states and 1330 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:46,207 INFO L93 Difference]: Finished difference Result 539 states and 1368 transitions. [2022-02-10 03:06:46,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:46,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:46,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:46,208 INFO L225 Difference]: With dead ends: 539 [2022-02-10 03:06:46,208 INFO L226 Difference]: Without dead ends: 535 [2022-02-10 03:06:46,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:46,208 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:46,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 89 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 161 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-02-10 03:06:46,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-10 03:06:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 516. [2022-02-10 03:06:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.588349514563107) internal successors, (1333), 515 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1333 transitions. [2022-02-10 03:06:46,213 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1333 transitions. Word has length 25 [2022-02-10 03:06:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:46,213 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1333 transitions. [2022-02-10 03:06:46,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1333 transitions. [2022-02-10 03:06:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:46,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:46,215 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:46,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-02-10 03:06:46,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-10 03:06:46,437 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash -261065581, now seen corresponding path program 140 times [2022-02-10 03:06:46,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:46,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81249279] [2022-02-10 03:06:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:46,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:46,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:46,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81249279] [2022-02-10 03:06:46,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81249279] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:46,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420859777] [2022-02-10 03:06:46,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:46,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:46,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:46,588 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:46,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-10 03:06:46,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:46,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:46,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:46,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:46,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:46,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:46,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:46,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:46,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:06:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:46,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:47,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:47,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:47,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:47,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:47,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:47,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:47,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420859777] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:47,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:47,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:47,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825485655] [2022-02-10 03:06:47,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:47,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:47,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:47,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:47,165 INFO L87 Difference]: Start difference. First operand 516 states and 1333 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:47,412 INFO L93 Difference]: Finished difference Result 586 states and 1473 transitions. [2022-02-10 03:06:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:06:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:47,414 INFO L225 Difference]: With dead ends: 586 [2022-02-10 03:06:47,414 INFO L226 Difference]: Without dead ends: 586 [2022-02-10 03:06:47,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:47,414 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:47,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 122 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 348 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-02-10 03:06:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-10 03:06:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 518. [2022-02-10 03:06:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.5938104448742747) internal successors, (1341), 517 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1341 transitions. [2022-02-10 03:06:47,419 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1341 transitions. Word has length 25 [2022-02-10 03:06:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:47,420 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1341 transitions. [2022-02-10 03:06:47,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1341 transitions. [2022-02-10 03:06:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:47,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:47,420 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:47,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-10 03:06:47,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-02-10 03:06:47,621 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash 144208737, now seen corresponding path program 141 times [2022-02-10 03:06:47,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:47,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64187597] [2022-02-10 03:06:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:47,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:47,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:47,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64187597] [2022-02-10 03:06:47,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64187597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:47,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285705433] [2022-02-10 03:06:47,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:47,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:47,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:47,772 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:47,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-10 03:06:47,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:06:47,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:47,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:47,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:47,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:47,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:47,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:47,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:48,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:48,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:48,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:48,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:48,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:48,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:48,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:48,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285705433] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:48,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:48,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:48,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719386403] [2022-02-10 03:06:48,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:48,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:48,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:48,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:48,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:48,328 INFO L87 Difference]: Start difference. First operand 518 states and 1341 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:48,591 INFO L93 Difference]: Finished difference Result 630 states and 1569 transitions. [2022-02-10 03:06:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:06:48,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:48,593 INFO L225 Difference]: With dead ends: 630 [2022-02-10 03:06:48,593 INFO L226 Difference]: Without dead ends: 630 [2022-02-10 03:06:48,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:06:48,593 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 76 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:48,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 142 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 436 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-02-10 03:06:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-10 03:06:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 523. [2022-02-10 03:06:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.6091954022988504) internal successors, (1362), 522 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1362 transitions. [2022-02-10 03:06:48,599 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1362 transitions. Word has length 25 [2022-02-10 03:06:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:48,599 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 1362 transitions. [2022-02-10 03:06:48,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1362 transitions. [2022-02-10 03:06:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:48,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:48,599 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:48,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:48,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-02-10 03:06:48,800 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:48,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash -3324537, now seen corresponding path program 142 times [2022-02-10 03:06:48,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:48,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52688600] [2022-02-10 03:06:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:48,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:48,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:48,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52688600] [2022-02-10 03:06:48,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52688600] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:48,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268347613] [2022-02-10 03:06:48,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:48,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:48,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:48,933 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:48,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-10 03:06:48,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:48,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:48,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:48,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:49,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:49,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:49,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2022-02-10 03:06:49,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:49,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-02-10 03:06:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:49,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:49,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:49,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:49,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:49,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:49,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:49,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:49,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268347613] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:49,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:49,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:06:49,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954133675] [2022-02-10 03:06:49,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:49,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:49,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:49,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:49,525 INFO L87 Difference]: Start difference. First operand 523 states and 1362 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:49,694 INFO L93 Difference]: Finished difference Result 591 states and 1474 transitions. [2022-02-10 03:06:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:06:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:49,696 INFO L225 Difference]: With dead ends: 591 [2022-02-10 03:06:49,696 INFO L226 Difference]: Without dead ends: 583 [2022-02-10 03:06:49,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:49,696 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:49,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 143 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 374 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-02-10 03:06:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-10 03:06:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 517. [2022-02-10 03:06:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.5910852713178296) internal successors, (1337), 516 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1337 transitions. [2022-02-10 03:06:49,701 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1337 transitions. Word has length 25 [2022-02-10 03:06:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:49,701 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1337 transitions. [2022-02-10 03:06:49,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1337 transitions. [2022-02-10 03:06:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:49,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:49,702 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:49,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-02-10 03:06:49,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-02-10 03:06:49,903 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1813360121, now seen corresponding path program 143 times [2022-02-10 03:06:49,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:49,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988829631] [2022-02-10 03:06:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:49,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:50,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:50,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988829631] [2022-02-10 03:06:50,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988829631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:50,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050268127] [2022-02-10 03:06:50,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:50,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:50,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:50,039 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:50,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-10 03:06:50,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:06:50,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:50,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:50,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:50,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:50,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:50,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:50,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:50,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:50,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:50,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:06:50,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:50,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:50,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:50,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:06:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:50,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050268127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:50,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:50,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:50,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744252026] [2022-02-10 03:06:50,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:50,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:50,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:50,655 INFO L87 Difference]: Start difference. First operand 517 states and 1337 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:50,931 INFO L93 Difference]: Finished difference Result 586 states and 1474 transitions. [2022-02-10 03:06:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:50,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:50,932 INFO L225 Difference]: With dead ends: 586 [2022-02-10 03:06:50,932 INFO L226 Difference]: Without dead ends: 586 [2022-02-10 03:06:50,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:06:50,933 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:50,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 182 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 497 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-02-10 03:06:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-10 03:06:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 526. [2022-02-10 03:06:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.6095238095238096) internal successors, (1370), 525 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1370 transitions. [2022-02-10 03:06:50,938 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1370 transitions. Word has length 25 [2022-02-10 03:06:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:50,938 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1370 transitions. [2022-02-10 03:06:50,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1370 transitions. [2022-02-10 03:06:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:50,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:50,939 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:50,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-02-10 03:06:51,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-02-10 03:06:51,140 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash 398383213, now seen corresponding path program 144 times [2022-02-10 03:06:51,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:51,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379294626] [2022-02-10 03:06:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:51,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:51,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:51,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379294626] [2022-02-10 03:06:51,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379294626] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:51,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943157554] [2022-02-10 03:06:51,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:51,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:51,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:51,261 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:51,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-10 03:06:51,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:06:51,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:51,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:51,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:51,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:51,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:51,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:51,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:51,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:51,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:51,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:51,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:51,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:51,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:51,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:51,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943157554] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:51,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:51,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:06:51,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795238476] [2022-02-10 03:06:51,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:51,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:51,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:51,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:51,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:51,779 INFO L87 Difference]: Start difference. First operand 526 states and 1370 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:52,108 INFO L93 Difference]: Finished difference Result 567 states and 1448 transitions. [2022-02-10 03:06:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:06:52,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:52,109 INFO L225 Difference]: With dead ends: 567 [2022-02-10 03:06:52,109 INFO L226 Difference]: Without dead ends: 559 [2022-02-10 03:06:52,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:06:52,109 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:52,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 115 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 406 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-02-10 03:06:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-02-10 03:06:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 526. [2022-02-10 03:06:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.6076190476190475) internal successors, (1369), 525 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1369 transitions. [2022-02-10 03:06:52,115 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1369 transitions. Word has length 25 [2022-02-10 03:06:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:52,115 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1369 transitions. [2022-02-10 03:06:52,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1369 transitions. [2022-02-10 03:06:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:52,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:52,116 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:52,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-02-10 03:06:52,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:52,316 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2108621851, now seen corresponding path program 145 times [2022-02-10 03:06:52,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:52,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917517116] [2022-02-10 03:06:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:52,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:52,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:52,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917517116] [2022-02-10 03:06:52,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917517116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:52,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488678028] [2022-02-10 03:06:52,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:52,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:52,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:52,460 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:52,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-10 03:06:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:52,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:52,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:52,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:52,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:06:52,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:52,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:06:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:52,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:52,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:52,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:06:52,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:52,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:52,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:52,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:06:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:53,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488678028] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:53,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:53,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:53,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656932196] [2022-02-10 03:06:53,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:53,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:53,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:53,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:53,029 INFO L87 Difference]: Start difference. First operand 526 states and 1369 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:53,361 INFO L93 Difference]: Finished difference Result 583 states and 1480 transitions. [2022-02-10 03:06:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:06:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:53,362 INFO L225 Difference]: With dead ends: 583 [2022-02-10 03:06:53,362 INFO L226 Difference]: Without dead ends: 583 [2022-02-10 03:06:53,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:06:53,362 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:53,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 124 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 401 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-02-10 03:06:53,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-10 03:06:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 518. [2022-02-10 03:06:53,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.5938104448742747) internal successors, (1341), 517 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1341 transitions. [2022-02-10 03:06:53,368 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1341 transitions. Word has length 25 [2022-02-10 03:06:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:53,368 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1341 transitions. [2022-02-10 03:06:53,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1341 transitions. [2022-02-10 03:06:53,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:53,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:53,369 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:53,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-10 03:06:53,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:53,569 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1719080573, now seen corresponding path program 146 times [2022-02-10 03:06:53,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:53,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784170913] [2022-02-10 03:06:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:53,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:53,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:53,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784170913] [2022-02-10 03:06:53,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784170913] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:53,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574464338] [2022-02-10 03:06:53,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:53,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:53,688 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:53,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-10 03:06:53,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:53,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:53,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:53,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:53,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:53,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:53,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:06:53,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:53,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:06:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:54,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:54,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:54,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-10 03:06:54,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:54,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:06:54,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:54,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:06:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:54,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574464338] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:54,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:54,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:06:54,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956261592] [2022-02-10 03:06:54,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:54,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:06:54,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:06:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:06:54,206 INFO L87 Difference]: Start difference. First operand 518 states and 1341 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:54,371 INFO L93 Difference]: Finished difference Result 549 states and 1389 transitions. [2022-02-10 03:06:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:06:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:54,372 INFO L225 Difference]: With dead ends: 549 [2022-02-10 03:06:54,372 INFO L226 Difference]: Without dead ends: 537 [2022-02-10 03:06:54,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:06:54,372 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:54,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 123 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 317 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-02-10 03:06:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-02-10 03:06:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 518. [2022-02-10 03:06:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.5899419729206965) internal successors, (1339), 517 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1339 transitions. [2022-02-10 03:06:54,377 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1339 transitions. Word has length 25 [2022-02-10 03:06:54,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:54,377 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1339 transitions. [2022-02-10 03:06:54,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1339 transitions. [2022-02-10 03:06:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:54,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:54,378 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:54,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-02-10 03:06:54,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:54,579 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1379337073, now seen corresponding path program 147 times [2022-02-10 03:06:54,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:54,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872039523] [2022-02-10 03:06:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:54,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:54,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:54,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872039523] [2022-02-10 03:06:54,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872039523] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:54,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486796645] [2022-02-10 03:06:54,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:06:54,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:54,733 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:54,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-10 03:06:54,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:06:54,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:54,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:54,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:54,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:55,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:55,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:06:55,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:55,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:06:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:55,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:55,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:55,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:06:55,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:55,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:06:55,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:55,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:06:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:55,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486796645] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:55,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:55,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:55,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783494004] [2022-02-10 03:06:55,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:55,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:55,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:55,312 INFO L87 Difference]: Start difference. First operand 518 states and 1339 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:55,570 INFO L93 Difference]: Finished difference Result 557 states and 1414 transitions. [2022-02-10 03:06:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:06:55,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:55,571 INFO L225 Difference]: With dead ends: 557 [2022-02-10 03:06:55,571 INFO L226 Difference]: Without dead ends: 557 [2022-02-10 03:06:55,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:06:55,572 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:55,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 82 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 246 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-02-10 03:06:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-02-10 03:06:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 517. [2022-02-10 03:06:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.5891472868217056) internal successors, (1336), 516 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1336 transitions. [2022-02-10 03:06:55,577 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1336 transitions. Word has length 25 [2022-02-10 03:06:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:55,577 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1336 transitions. [2022-02-10 03:06:55,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1336 transitions. [2022-02-10 03:06:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:55,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:55,578 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:55,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-02-10 03:06:55,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:55,778 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:55,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1093482691, now seen corresponding path program 148 times [2022-02-10 03:06:55,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:55,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550421099] [2022-02-10 03:06:55,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:55,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:55,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:55,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550421099] [2022-02-10 03:06:55,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550421099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:55,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784420095] [2022-02-10 03:06:55,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:06:55,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:55,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:55,866 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:55,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-10 03:06:55,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:06:55,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:55,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:55,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:55,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:56,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:06:56,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:06:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:56,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:56,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:56,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:56,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:56,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:56,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:56,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:56,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784420095] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:56,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:56,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:06:56,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154258121] [2022-02-10 03:06:56,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:56,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:56,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:56,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:56,275 INFO L87 Difference]: Start difference. First operand 517 states and 1336 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:56,448 INFO L93 Difference]: Finished difference Result 565 states and 1443 transitions. [2022-02-10 03:06:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:06:56,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:56,449 INFO L225 Difference]: With dead ends: 565 [2022-02-10 03:06:56,449 INFO L226 Difference]: Without dead ends: 565 [2022-02-10 03:06:56,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:56,449 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:56,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 104 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:06:56,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-02-10 03:06:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 526. [2022-02-10 03:06:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.598095238095238) internal successors, (1364), 525 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1364 transitions. [2022-02-10 03:06:56,455 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1364 transitions. Word has length 25 [2022-02-10 03:06:56,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:56,455 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1364 transitions. [2022-02-10 03:06:56,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1364 transitions. [2022-02-10 03:06:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:56,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:56,456 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:56,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-02-10 03:06:56,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-02-10 03:06:56,656 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:56,656 INFO L85 PathProgramCache]: Analyzing trace with hash 798220961, now seen corresponding path program 149 times [2022-02-10 03:06:56,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:56,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927196969] [2022-02-10 03:06:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:56,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:56,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:56,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927196969] [2022-02-10 03:06:56,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927196969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:56,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597809961] [2022-02-10 03:06:56,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:06:56,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:56,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:56,775 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:56,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-10 03:06:56,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:06:56,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:56,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:56,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:56,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:56,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:57,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:57,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:57,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:57,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:06:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:57,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:57,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:57,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:06:57,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:57,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:06:57,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:57,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:57,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597809961] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:57,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:57,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:06:57,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383487761] [2022-02-10 03:06:57,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:57,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:06:57,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:06:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:57,325 INFO L87 Difference]: Start difference. First operand 526 states and 1364 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:57,754 INFO L93 Difference]: Finished difference Result 670 states and 1639 transitions. [2022-02-10 03:06:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:06:57,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:57,756 INFO L225 Difference]: With dead ends: 670 [2022-02-10 03:06:57,756 INFO L226 Difference]: Without dead ends: 670 [2022-02-10 03:06:57,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:06:57,756 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:57,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 191 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 587 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-02-10 03:06:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-02-10 03:06:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 531. [2022-02-10 03:06:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.607547169811321) internal successors, (1382), 530 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1382 transitions. [2022-02-10 03:06:57,762 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1382 transitions. Word has length 25 [2022-02-10 03:06:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:57,762 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1382 transitions. [2022-02-10 03:06:57,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1382 transitions. [2022-02-10 03:06:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:57,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:57,763 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:57,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-10 03:06:57,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-02-10 03:06:57,964 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:57,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1590976679, now seen corresponding path program 150 times [2022-02-10 03:06:57,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:57,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132191802] [2022-02-10 03:06:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:57,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:58,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:58,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132191802] [2022-02-10 03:06:58,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132191802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:58,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290030147] [2022-02-10 03:06:58,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:06:58,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:58,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:58,079 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:58,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-10 03:06:58,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:06:58,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:58,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:58,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:58,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:58,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:58,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:58,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:06:58,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:06:58,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:06:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:58,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:58,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:58,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:58,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:58,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:58,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:58,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290030147] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:58,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:58,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:06:58,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940862864] [2022-02-10 03:06:58,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:58,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:06:58,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:58,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:06:58,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:58,585 INFO L87 Difference]: Start difference. First operand 531 states and 1382 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:58,708 INFO L93 Difference]: Finished difference Result 575 states and 1476 transitions. [2022-02-10 03:06:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:06:58,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:58,709 INFO L225 Difference]: With dead ends: 575 [2022-02-10 03:06:58,709 INFO L226 Difference]: Without dead ends: 575 [2022-02-10 03:06:58,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:06:58,710 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:58,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 79 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 257 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-02-10 03:06:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-02-10 03:06:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 528. [2022-02-10 03:06:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.6053130929791273) internal successors, (1373), 527 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1373 transitions. [2022-02-10 03:06:58,715 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1373 transitions. Word has length 25 [2022-02-10 03:06:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:58,715 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1373 transitions. [2022-02-10 03:06:58,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1373 transitions. [2022-02-10 03:06:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:58,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:58,716 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:58,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-02-10 03:06:58,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-02-10 03:06:58,916 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:58,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:58,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1940519393, now seen corresponding path program 151 times [2022-02-10 03:06:58,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:58,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043661024] [2022-02-10 03:06:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:58,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:59,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:59,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043661024] [2022-02-10 03:06:59,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043661024] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:59,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483670866] [2022-02-10 03:06:59,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:06:59,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:59,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:59,002 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:59,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-10 03:06:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:06:59,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:59,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:06:59,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:06:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:59,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:06:59,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:59,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:06:59,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:59,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:06:59,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:06:59,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:06:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:59,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483670866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:06:59,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:06:59,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:06:59,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770052667] [2022-02-10 03:06:59,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:06:59,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:06:59,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:06:59,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:06:59,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:06:59,436 INFO L87 Difference]: Start difference. First operand 528 states and 1373 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:06:59,626 INFO L93 Difference]: Finished difference Result 577 states and 1477 transitions. [2022-02-10 03:06:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:06:59,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:06:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:06:59,627 INFO L225 Difference]: With dead ends: 577 [2022-02-10 03:06:59,627 INFO L226 Difference]: Without dead ends: 577 [2022-02-10 03:06:59,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:06:59,627 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:06:59,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 114 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:06:59,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-02-10 03:06:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 524. [2022-02-10 03:06:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.6003824091778203) internal successors, (1360), 523 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1360 transitions. [2022-02-10 03:06:59,632 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1360 transitions. Word has length 25 [2022-02-10 03:06:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:06:59,633 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1360 transitions. [2022-02-10 03:06:59,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:06:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1360 transitions. [2022-02-10 03:06:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:06:59,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:06:59,633 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:06:59,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-02-10 03:06:59,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-02-10 03:06:59,834 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:06:59,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:06:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1946541475, now seen corresponding path program 152 times [2022-02-10 03:06:59,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:06:59,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848007750] [2022-02-10 03:06:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:06:59,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:06:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:06:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:06:59,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:06:59,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848007750] [2022-02-10 03:06:59,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848007750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:06:59,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731528975] [2022-02-10 03:06:59,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:06:59,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:06:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:06:59,916 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:06:59,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-10 03:06:59,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:06:59,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:06:59,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:06:59,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:06:59,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:00,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:00,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:07:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:00,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:00,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:00,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:00,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:00,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:00,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:00,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:00,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731528975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:00,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:00,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:07:00,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59008063] [2022-02-10 03:07:00,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:00,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:00,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:00,360 INFO L87 Difference]: Start difference. First operand 524 states and 1360 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:00,565 INFO L93 Difference]: Finished difference Result 611 states and 1536 transitions. [2022-02-10 03:07:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:07:00,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:00,566 INFO L225 Difference]: With dead ends: 611 [2022-02-10 03:07:00,566 INFO L226 Difference]: Without dead ends: 597 [2022-02-10 03:07:00,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:00,566 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:00,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 138 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:07:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-02-10 03:07:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 540. [2022-02-10 03:07:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.6066790352504636) internal successors, (1405), 539 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1405 transitions. [2022-02-10 03:07:00,572 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1405 transitions. Word has length 25 [2022-02-10 03:07:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:00,572 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1405 transitions. [2022-02-10 03:07:00,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1405 transitions. [2022-02-10 03:07:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:00,573 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:00,573 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:00,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-02-10 03:07:00,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:00,773 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash 538390237, now seen corresponding path program 153 times [2022-02-10 03:07:00,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:00,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343867553] [2022-02-10 03:07:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:00,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:00,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:00,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343867553] [2022-02-10 03:07:00,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343867553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:00,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297806512] [2022-02-10 03:07:00,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:00,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:00,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:00,897 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:00,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-10 03:07:00,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:07:00,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:00,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:00,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:00,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:00,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:01,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:01,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:07:01,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:07:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:01,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:01,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:01,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:01,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:01,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:01,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:01,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:01,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297806512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:01,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:01,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:07:01,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129277786] [2022-02-10 03:07:01,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:01,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:01,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:01,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:01,552 INFO L87 Difference]: Start difference. First operand 540 states and 1405 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:01,678 INFO L93 Difference]: Finished difference Result 583 states and 1492 transitions. [2022-02-10 03:07:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:01,678 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:01,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:01,679 INFO L225 Difference]: With dead ends: 583 [2022-02-10 03:07:01,679 INFO L226 Difference]: Without dead ends: 583 [2022-02-10 03:07:01,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:01,679 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:01,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 111 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 339 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-02-10 03:07:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-10 03:07:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 546. [2022-02-10 03:07:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.614678899082569) internal successors, (1425), 545 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1425 transitions. [2022-02-10 03:07:01,685 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1425 transitions. Word has length 25 [2022-02-10 03:07:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:01,685 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1425 transitions. [2022-02-10 03:07:01,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1425 transitions. [2022-02-10 03:07:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:01,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:01,686 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:01,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-02-10 03:07:01,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:01,887 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:01,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1112413727, now seen corresponding path program 154 times [2022-02-10 03:07:01,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:01,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25933421] [2022-02-10 03:07:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:01,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:07:02,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:02,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25933421] [2022-02-10 03:07:02,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25933421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:02,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198807100] [2022-02-10 03:07:02,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:02,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:02,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:02,005 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:02,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-10 03:07:02,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:02,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:02,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:02,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:02,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:02,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:02,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:02,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:02,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:07:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:07:02,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:02,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:02,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:02,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:02,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:02,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:02,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:07:02,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198807100] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:02,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:02,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:02,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798401643] [2022-02-10 03:07:02,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:02,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:02,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:02,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:02,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:02,601 INFO L87 Difference]: Start difference. First operand 546 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:02,781 INFO L93 Difference]: Finished difference Result 577 states and 1479 transitions. [2022-02-10 03:07:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:07:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:02,782 INFO L225 Difference]: With dead ends: 577 [2022-02-10 03:07:02,782 INFO L226 Difference]: Without dead ends: 577 [2022-02-10 03:07:02,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:02,783 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:02,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 143 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 415 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-02-10 03:07:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-02-10 03:07:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 524. [2022-02-10 03:07:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.6003824091778203) internal successors, (1360), 523 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1360 transitions. [2022-02-10 03:07:02,798 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1360 transitions. Word has length 25 [2022-02-10 03:07:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:02,798 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1360 transitions. [2022-02-10 03:07:02,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1360 transitions. [2022-02-10 03:07:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:02,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:02,799 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:02,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-02-10 03:07:03,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:03,003 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:03,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:03,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2108012763, now seen corresponding path program 155 times [2022-02-10 03:07:03,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:03,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021154697] [2022-02-10 03:07:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:03,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:03,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:03,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021154697] [2022-02-10 03:07:03,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021154697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:03,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645825270] [2022-02-10 03:07:03,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:03,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:03,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:03,105 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:03,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-10 03:07:03,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:07:03,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:03,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:03,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:03,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:03,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:03,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:03,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-02-10 03:07:03,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:03,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2022-02-10 03:07:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:03,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:03,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:03,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:03,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:03,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:03,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:03,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:03,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645825270] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:03,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:03,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:07:03,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927258597] [2022-02-10 03:07:03,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:03,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:03,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:03,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:03,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:03,545 INFO L87 Difference]: Start difference. First operand 524 states and 1360 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:03,698 INFO L93 Difference]: Finished difference Result 606 states and 1512 transitions. [2022-02-10 03:07:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:07:03,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:03,699 INFO L225 Difference]: With dead ends: 606 [2022-02-10 03:07:03,699 INFO L226 Difference]: Without dead ends: 590 [2022-02-10 03:07:03,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:03,699 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:03,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 129 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 322 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-02-10 03:07:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-02-10 03:07:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 525. [2022-02-10 03:07:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.599236641221374) internal successors, (1362), 524 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1362 transitions. [2022-02-10 03:07:03,705 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1362 transitions. Word has length 25 [2022-02-10 03:07:03,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:03,705 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1362 transitions. [2022-02-10 03:07:03,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1362 transitions. [2022-02-10 03:07:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:03,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:03,706 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:03,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-02-10 03:07:03,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:03,906 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash 216992207, now seen corresponding path program 156 times [2022-02-10 03:07:03,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:03,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46193955] [2022-02-10 03:07:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:03,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:04,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:04,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46193955] [2022-02-10 03:07:04,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46193955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:04,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108365306] [2022-02-10 03:07:04,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:04,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:04,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:04,025 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:04,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-10 03:07:04,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:07:04,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:04,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:04,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:04,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:04,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:04,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:04,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:04,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:07:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:04,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:04,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:04,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:04,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:04,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:04,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:04,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:04,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108365306] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:04,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:04,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:04,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134895545] [2022-02-10 03:07:04,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:04,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:04,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:04,641 INFO L87 Difference]: Start difference. First operand 525 states and 1362 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:04,786 INFO L93 Difference]: Finished difference Result 587 states and 1501 transitions. [2022-02-10 03:07:04,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:04,786 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:04,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:04,787 INFO L225 Difference]: With dead ends: 587 [2022-02-10 03:07:04,787 INFO L226 Difference]: Without dead ends: 587 [2022-02-10 03:07:04,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:04,788 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:04,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 148 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 392 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-02-10 03:07:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-02-10 03:07:04,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 525. [2022-02-10 03:07:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.599236641221374) internal successors, (1362), 524 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:04,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1362 transitions. [2022-02-10 03:07:04,794 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1362 transitions. Word has length 25 [2022-02-10 03:07:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:04,794 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1362 transitions. [2022-02-10 03:07:04,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1362 transitions. [2022-02-10 03:07:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:04,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:04,795 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:04,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-02-10 03:07:04,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2022-02-10 03:07:04,995 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:04,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1865001939, now seen corresponding path program 157 times [2022-02-10 03:07:04,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:04,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798185872] [2022-02-10 03:07:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:04,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:05,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:05,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798185872] [2022-02-10 03:07:05,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798185872] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:05,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234042814] [2022-02-10 03:07:05,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:05,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:05,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:05,102 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:05,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-10 03:07:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:05,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:05,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:05,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:05,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:05,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:05,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:07:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:05,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:05,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:05,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:05,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:05,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:05,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:05,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:05,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234042814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:05,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:05,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:05,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405060502] [2022-02-10 03:07:05,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:05,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:05,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:05,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:05,573 INFO L87 Difference]: Start difference. First operand 525 states and 1362 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:05,763 INFO L93 Difference]: Finished difference Result 574 states and 1449 transitions. [2022-02-10 03:07:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:05,764 INFO L225 Difference]: With dead ends: 574 [2022-02-10 03:07:05,764 INFO L226 Difference]: Without dead ends: 574 [2022-02-10 03:07:05,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:07:05,765 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:05,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 97 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 359 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-02-10 03:07:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-02-10 03:07:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 521. [2022-02-10 03:07:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.5942307692307693) internal successors, (1349), 520 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1349 transitions. [2022-02-10 03:07:05,772 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1349 transitions. Word has length 25 [2022-02-10 03:07:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:05,772 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 1349 transitions. [2022-02-10 03:07:05,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1349 transitions. [2022-02-10 03:07:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:05,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:05,773 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:05,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-02-10 03:07:05,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:05,987 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash 734563975, now seen corresponding path program 158 times [2022-02-10 03:07:05,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:05,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152242477] [2022-02-10 03:07:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:05,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:06,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:06,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152242477] [2022-02-10 03:07:06,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152242477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:06,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988884994] [2022-02-10 03:07:06,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:06,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:06,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:06,090 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:06,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-10 03:07:06,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:06,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:06,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:06,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:06,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:06,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:06,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:06,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:07:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:06,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:06,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:06,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:06,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:06,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:06,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:06,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:06,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988884994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:06,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:06,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:07:06,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391049767] [2022-02-10 03:07:06,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:06,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:06,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:06,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:06,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:06,544 INFO L87 Difference]: Start difference. First operand 521 states and 1349 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:06,717 INFO L93 Difference]: Finished difference Result 551 states and 1401 transitions. [2022-02-10 03:07:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:07:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:06,718 INFO L225 Difference]: With dead ends: 551 [2022-02-10 03:07:06,718 INFO L226 Difference]: Without dead ends: 549 [2022-02-10 03:07:06,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:06,719 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:06,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 94 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 345 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-02-10 03:07:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-02-10 03:07:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 515. [2022-02-10 03:07:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.585603112840467) internal successors, (1329), 514 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1329 transitions. [2022-02-10 03:07:06,724 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1329 transitions. Word has length 25 [2022-02-10 03:07:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:06,724 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1329 transitions. [2022-02-10 03:07:06,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:06,724 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1329 transitions. [2022-02-10 03:07:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:06,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:06,725 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:06,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-02-10 03:07:06,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:06,925 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1866113917, now seen corresponding path program 159 times [2022-02-10 03:07:06,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:06,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045222676] [2022-02-10 03:07:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:06,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:07,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:07,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045222676] [2022-02-10 03:07:07,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045222676] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:07,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409655876] [2022-02-10 03:07:07,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:07,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:07,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:07,012 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:07,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-10 03:07:07,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:07:07,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:07,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:07,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:07,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:07:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:07,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:07,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:07,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:07,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:07,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:07,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:07,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:07,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409655876] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:07,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:07,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:07:07,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494634068] [2022-02-10 03:07:07,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:07,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:07,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:07,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:07,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:07,363 INFO L87 Difference]: Start difference. First operand 515 states and 1329 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:07,547 INFO L93 Difference]: Finished difference Result 554 states and 1410 transitions. [2022-02-10 03:07:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:07,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:07,548 INFO L225 Difference]: With dead ends: 554 [2022-02-10 03:07:07,548 INFO L226 Difference]: Without dead ends: 554 [2022-02-10 03:07:07,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:07,549 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:07,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 131 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:07:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-02-10 03:07:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 514. [2022-02-10 03:07:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 2.586744639376218) internal successors, (1327), 513 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1327 transitions. [2022-02-10 03:07:07,556 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1327 transitions. Word has length 25 [2022-02-10 03:07:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:07,556 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1327 transitions. [2022-02-10 03:07:07,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1327 transitions. [2022-02-10 03:07:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:07,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:07,557 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:07,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:07,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-10 03:07:07,779 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1912522503, now seen corresponding path program 160 times [2022-02-10 03:07:07,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:07,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186489735] [2022-02-10 03:07:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:07,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:07,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:07,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186489735] [2022-02-10 03:07:07,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186489735] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:07,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136902842] [2022-02-10 03:07:07,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:07,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:07,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:07,876 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:07,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-10 03:07:07,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:07,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:07,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:08,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:07:08,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:07:08,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:07:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:08,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:08,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:08,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:08,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:08,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:08,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:08,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:08,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136902842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:08,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:08,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:07:08,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511458414] [2022-02-10 03:07:08,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:08,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:08,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:08,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:08,290 INFO L87 Difference]: Start difference. First operand 514 states and 1327 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:08,486 INFO L93 Difference]: Finished difference Result 606 states and 1507 transitions. [2022-02-10 03:07:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:07:08,486 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:08,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:08,487 INFO L225 Difference]: With dead ends: 606 [2022-02-10 03:07:08,487 INFO L226 Difference]: Without dead ends: 606 [2022-02-10 03:07:08,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:08,487 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:08,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 118 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:07:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-02-10 03:07:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 507. [2022-02-10 03:07:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.5869565217391304) internal successors, (1309), 506 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1309 transitions. [2022-02-10 03:07:08,493 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1309 transitions. Word has length 25 [2022-02-10 03:07:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:08,493 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1309 transitions. [2022-02-10 03:07:08,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1309 transitions. [2022-02-10 03:07:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:08,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:08,494 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:08,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-02-10 03:07:08,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-10 03:07:08,694 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 786804807, now seen corresponding path program 161 times [2022-02-10 03:07:08,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:08,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637060480] [2022-02-10 03:07:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:08,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:08,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:08,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637060480] [2022-02-10 03:07:08,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637060480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:08,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42468468] [2022-02-10 03:07:08,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:08,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:08,791 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:08,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-10 03:07:08,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:07:08,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:08,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:08,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:08,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:08,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-02-10 03:07:08,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-10 03:07:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:09,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:09,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:09,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:09,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:09,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:09,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:09,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:09,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42468468] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:09,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:09,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:09,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572340278] [2022-02-10 03:07:09,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:09,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:09,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:09,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:09,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:09,339 INFO L87 Difference]: Start difference. First operand 507 states and 1309 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:09,529 INFO L93 Difference]: Finished difference Result 680 states and 1695 transitions. [2022-02-10 03:07:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:07:09,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:09,530 INFO L225 Difference]: With dead ends: 680 [2022-02-10 03:07:09,530 INFO L226 Difference]: Without dead ends: 680 [2022-02-10 03:07:09,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:09,531 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:09,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 163 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 359 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-02-10 03:07:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-02-10 03:07:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 531. [2022-02-10 03:07:09,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.6358490566037736) internal successors, (1397), 530 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1397 transitions. [2022-02-10 03:07:09,538 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1397 transitions. Word has length 25 [2022-02-10 03:07:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:09,538 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1397 transitions. [2022-02-10 03:07:09,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1397 transitions. [2022-02-10 03:07:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:09,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:09,538 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:09,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-02-10 03:07:09,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-10 03:07:09,739 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:09,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:09,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1577198927, now seen corresponding path program 162 times [2022-02-10 03:07:09,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:09,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127771779] [2022-02-10 03:07:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:09,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:07:09,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:09,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127771779] [2022-02-10 03:07:09,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127771779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:09,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852882696] [2022-02-10 03:07:09,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:09,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:09,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:09,859 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:09,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-10 03:07:09,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:07:09,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:09,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:09,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:09,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:10,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:10,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-02-10 03:07:10,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:10,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2022-02-10 03:07:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:07:10,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:10,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:10,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:10,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:10,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:10,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:10,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:07:10,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852882696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:10,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:10,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:10,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943323601] [2022-02-10 03:07:10,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:10,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:10,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:10,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:10,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:10,458 INFO L87 Difference]: Start difference. First operand 531 states and 1397 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:10,604 INFO L93 Difference]: Finished difference Result 603 states and 1554 transitions. [2022-02-10 03:07:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:07:10,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:10,605 INFO L225 Difference]: With dead ends: 603 [2022-02-10 03:07:10,605 INFO L226 Difference]: Without dead ends: 603 [2022-02-10 03:07:10,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:07:10,606 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:10,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 132 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 237 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-02-10 03:07:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-10 03:07:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 532. [2022-02-10 03:07:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.6365348399246704) internal successors, (1400), 531 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1400 transitions. [2022-02-10 03:07:10,611 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1400 transitions. Word has length 25 [2022-02-10 03:07:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:10,611 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1400 transitions. [2022-02-10 03:07:10,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1400 transitions. [2022-02-10 03:07:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:10,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:10,612 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:10,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-02-10 03:07:10,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-02-10 03:07:10,813 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:10,813 INFO L85 PathProgramCache]: Analyzing trace with hash 491543077, now seen corresponding path program 163 times [2022-02-10 03:07:10,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:10,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959727898] [2022-02-10 03:07:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:10,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:10,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:10,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959727898] [2022-02-10 03:07:10,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959727898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:10,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42854198] [2022-02-10 03:07:10,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:10,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:10,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:10,960 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:10,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-10 03:07:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:10,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:11,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:11,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:11,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:11,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:11,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:11,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:11,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:11,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:11,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:11,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:11,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:11,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:11,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:11,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:11,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42854198] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:11,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:11,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:11,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684829620] [2022-02-10 03:07:11,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:11,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:11,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:11,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:11,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:11,508 INFO L87 Difference]: Start difference. First operand 532 states and 1400 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:11,715 INFO L93 Difference]: Finished difference Result 607 states and 1557 transitions. [2022-02-10 03:07:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:07:11,715 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:11,716 INFO L225 Difference]: With dead ends: 607 [2022-02-10 03:07:11,717 INFO L226 Difference]: Without dead ends: 607 [2022-02-10 03:07:11,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:11,717 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:11,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 130 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 418 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-02-10 03:07:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-02-10 03:07:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 531. [2022-02-10 03:07:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.6358490566037736) internal successors, (1397), 530 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:11,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1397 transitions. [2022-02-10 03:07:11,723 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1397 transitions. Word has length 25 [2022-02-10 03:07:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:11,723 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1397 transitions. [2022-02-10 03:07:11,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1397 transitions. [2022-02-10 03:07:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:11,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:11,723 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:11,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-02-10 03:07:11,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2022-02-10 03:07:11,924 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:11,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1982473245, now seen corresponding path program 164 times [2022-02-10 03:07:11,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:11,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374728743] [2022-02-10 03:07:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:11,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:07:12,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:12,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374728743] [2022-02-10 03:07:12,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374728743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:12,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941616854] [2022-02-10 03:07:12,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:12,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:12,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:12,042 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:12,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-10 03:07:12,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:12,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:12,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:12,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:12,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:12,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:12,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:12,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:07:12,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:12,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:07:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:07:12,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:12,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:12,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:12,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:12,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:12,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:12,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:07:12,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941616854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:12,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:12,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:12,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323541712] [2022-02-10 03:07:12,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:12,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:12,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:12,599 INFO L87 Difference]: Start difference. First operand 531 states and 1397 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:12,887 INFO L93 Difference]: Finished difference Result 606 states and 1570 transitions. [2022-02-10 03:07:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:07:12,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:12,888 INFO L225 Difference]: With dead ends: 606 [2022-02-10 03:07:12,888 INFO L226 Difference]: Without dead ends: 606 [2022-02-10 03:07:12,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:07:12,889 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:12,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 164 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 460 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-02-10 03:07:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-02-10 03:07:12,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 533. [2022-02-10 03:07:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.6334586466165413) internal successors, (1401), 532 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1401 transitions. [2022-02-10 03:07:12,894 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1401 transitions. Word has length 25 [2022-02-10 03:07:12,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:12,894 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 1401 transitions. [2022-02-10 03:07:12,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1401 transitions. [2022-02-10 03:07:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:12,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:12,895 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:12,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-02-10 03:07:13,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-02-10 03:07:13,096 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1976691103, now seen corresponding path program 165 times [2022-02-10 03:07:13,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:13,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844791295] [2022-02-10 03:07:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:13,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:13,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:13,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844791295] [2022-02-10 03:07:13,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844791295] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:13,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951963357] [2022-02-10 03:07:13,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:13,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:13,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:13,237 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:13,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-10 03:07:13,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:07:13,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:13,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:13,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:13,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:13,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:07:13,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:13,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-02-10 03:07:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:13,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:13,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:13,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:13,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:13,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:13,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:13,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:13,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951963357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:13,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:13,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:07:13,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774344027] [2022-02-10 03:07:13,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:13,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:13,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:13,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:13,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:13,968 INFO L87 Difference]: Start difference. First operand 533 states and 1401 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:14,304 INFO L93 Difference]: Finished difference Result 576 states and 1470 transitions. [2022-02-10 03:07:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:07:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:14,305 INFO L225 Difference]: With dead ends: 576 [2022-02-10 03:07:14,305 INFO L226 Difference]: Without dead ends: 562 [2022-02-10 03:07:14,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:07:14,305 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:14,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 136 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-02-10 03:07:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-02-10 03:07:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 533. [2022-02-10 03:07:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.6240601503759398) internal successors, (1396), 532 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1396 transitions. [2022-02-10 03:07:14,311 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1396 transitions. Word has length 25 [2022-02-10 03:07:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:14,311 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 1396 transitions. [2022-02-10 03:07:14,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1396 transitions. [2022-02-10 03:07:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:14,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:14,311 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:14,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:14,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-02-10 03:07:14,512 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2041747937, now seen corresponding path program 166 times [2022-02-10 03:07:14,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:14,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430495176] [2022-02-10 03:07:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:14,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:14,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:14,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430495176] [2022-02-10 03:07:14,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430495176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:14,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501549058] [2022-02-10 03:07:14,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:14,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:14,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:14,621 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:14,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-10 03:07:14,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:14,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:14,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:14,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:15,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:15,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:15,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:15,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:07:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:15,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:15,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:15,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:15,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:15,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:15,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:15,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:15,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501549058] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:15,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:15,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:15,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146839139] [2022-02-10 03:07:15,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:15,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:15,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:15,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:15,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:15,310 INFO L87 Difference]: Start difference. First operand 533 states and 1396 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:15,524 INFO L93 Difference]: Finished difference Result 643 states and 1649 transitions. [2022-02-10 03:07:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:07:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:15,525 INFO L225 Difference]: With dead ends: 643 [2022-02-10 03:07:15,525 INFO L226 Difference]: Without dead ends: 643 [2022-02-10 03:07:15,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:07:15,525 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:15,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 138 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 325 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-02-10 03:07:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-02-10 03:07:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 530. [2022-02-10 03:07:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.6257088846880907) internal successors, (1389), 529 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1389 transitions. [2022-02-10 03:07:15,531 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1389 transitions. Word has length 25 [2022-02-10 03:07:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:15,531 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1389 transitions. [2022-02-10 03:07:15,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1389 transitions. [2022-02-10 03:07:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:15,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:15,532 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:15,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-02-10 03:07:15,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:15,732 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1421467807, now seen corresponding path program 167 times [2022-02-10 03:07:15,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:15,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825016255] [2022-02-10 03:07:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:15,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:15,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:15,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825016255] [2022-02-10 03:07:15,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825016255] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:15,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195185182] [2022-02-10 03:07:15,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:15,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:15,853 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:15,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-10 03:07:15,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:07:15,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:15,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:15,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:15,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:16,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:16,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:07:16,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:16,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:07:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:16,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:16,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:16,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:16,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:16,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:16,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:16,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:16,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195185182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:16,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:16,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:07:16,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386145930] [2022-02-10 03:07:16,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:16,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:16,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:16,352 INFO L87 Difference]: Start difference. First operand 530 states and 1389 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:16,588 INFO L93 Difference]: Finished difference Result 577 states and 1462 transitions. [2022-02-10 03:07:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:16,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:16,589 INFO L225 Difference]: With dead ends: 577 [2022-02-10 03:07:16,589 INFO L226 Difference]: Without dead ends: 573 [2022-02-10 03:07:16,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:16,589 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:16,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 106 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 301 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-02-10 03:07:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-02-10 03:07:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 537. [2022-02-10 03:07:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 2.6063432835820897) internal successors, (1397), 536 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1397 transitions. [2022-02-10 03:07:16,595 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1397 transitions. Word has length 25 [2022-02-10 03:07:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:16,595 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1397 transitions. [2022-02-10 03:07:16,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1397 transitions. [2022-02-10 03:07:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:16,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:16,595 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:16,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:16,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:16,796 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 439362307, now seen corresponding path program 168 times [2022-02-10 03:07:16,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:16,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982560367] [2022-02-10 03:07:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:16,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:16,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:16,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982560367] [2022-02-10 03:07:16,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982560367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:16,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765679508] [2022-02-10 03:07:16,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:16,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:16,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:16,928 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:16,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-10 03:07:16,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:07:16,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:17,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:17,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:17,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:17,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:07:17,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:17,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:07:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:17,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:17,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:17,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:17,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:17,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:17,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:17,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:17,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765679508] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:17,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:17,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:07:17,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650854418] [2022-02-10 03:07:17,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:17,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:17,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:17,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:17,516 INFO L87 Difference]: Start difference. First operand 537 states and 1397 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:17,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:17,774 INFO L93 Difference]: Finished difference Result 560 states and 1431 transitions. [2022-02-10 03:07:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:17,775 INFO L225 Difference]: With dead ends: 560 [2022-02-10 03:07:17,775 INFO L226 Difference]: Without dead ends: 551 [2022-02-10 03:07:17,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:17,775 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:17,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 107 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 319 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-02-10 03:07:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-02-10 03:07:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 530. [2022-02-10 03:07:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.623818525519849) internal successors, (1388), 529 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1388 transitions. [2022-02-10 03:07:17,781 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1388 transitions. Word has length 25 [2022-02-10 03:07:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:17,781 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1388 transitions. [2022-02-10 03:07:17,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:17,781 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1388 transitions. [2022-02-10 03:07:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:17,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:17,781 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:17,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-02-10 03:07:17,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:17,982 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:17,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:17,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1478568899, now seen corresponding path program 169 times [2022-02-10 03:07:17,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:17,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160376534] [2022-02-10 03:07:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:17,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:18,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:18,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160376534] [2022-02-10 03:07:18,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160376534] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:18,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530428465] [2022-02-10 03:07:18,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:18,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:18,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:18,105 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:18,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-10 03:07:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:18,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:18,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:18,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:18,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:18,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:18,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:18,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:18,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:07:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:18,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:18,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:18,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:18,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:18,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:18,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:18,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:18,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530428465] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:18,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:18,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:18,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262568930] [2022-02-10 03:07:18,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:18,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:18,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:18,657 INFO L87 Difference]: Start difference. First operand 530 states and 1388 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:18,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:18,831 INFO L93 Difference]: Finished difference Result 647 states and 1679 transitions. [2022-02-10 03:07:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:07:18,831 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:18,832 INFO L225 Difference]: With dead ends: 647 [2022-02-10 03:07:18,832 INFO L226 Difference]: Without dead ends: 647 [2022-02-10 03:07:18,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:07:18,832 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:18,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 108 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 249 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-02-10 03:07:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-02-10 03:07:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 542. [2022-02-10 03:07:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.6487985212569316) internal successors, (1433), 541 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1433 transitions. [2022-02-10 03:07:18,838 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1433 transitions. Word has length 25 [2022-02-10 03:07:18,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:18,838 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1433 transitions. [2022-02-10 03:07:18,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:18,838 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1433 transitions. [2022-02-10 03:07:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:18,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:18,839 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:18,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-02-10 03:07:19,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:19,040 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:19,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:19,040 INFO L85 PathProgramCache]: Analyzing trace with hash 725222113, now seen corresponding path program 170 times [2022-02-10 03:07:19,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:19,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088736227] [2022-02-10 03:07:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:19,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:19,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:19,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088736227] [2022-02-10 03:07:19,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088736227] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:19,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741608260] [2022-02-10 03:07:19,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:19,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:19,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:19,136 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:19,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-10 03:07:19,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:19,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:19,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:19,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:19,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:19,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:07:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:19,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:19,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:19,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:19,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:19,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:19,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:19,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:19,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741608260] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:19,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:19,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:07:19,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768916303] [2022-02-10 03:07:19,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:19,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:19,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:19,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:19,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:19,564 INFO L87 Difference]: Start difference. First operand 542 states and 1433 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:19,747 INFO L93 Difference]: Finished difference Result 672 states and 1697 transitions. [2022-02-10 03:07:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:07:19,747 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:19,748 INFO L225 Difference]: With dead ends: 672 [2022-02-10 03:07:19,748 INFO L226 Difference]: Without dead ends: 672 [2022-02-10 03:07:19,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:19,749 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:19,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 119 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:07:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-02-10 03:07:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 522. [2022-02-10 03:07:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 2.616122840690979) internal successors, (1363), 521 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1363 transitions. [2022-02-10 03:07:19,757 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1363 transitions. Word has length 25 [2022-02-10 03:07:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:19,757 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1363 transitions. [2022-02-10 03:07:19,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1363 transitions. [2022-02-10 03:07:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:19,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:19,758 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:19,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-02-10 03:07:19,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-02-10 03:07:19,967 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1871205247, now seen corresponding path program 171 times [2022-02-10 03:07:19,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:19,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336199095] [2022-02-10 03:07:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:19,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:20,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:20,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336199095] [2022-02-10 03:07:20,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336199095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:20,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594451556] [2022-02-10 03:07:20,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:20,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:20,095 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:20,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-10 03:07:20,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:20,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:20,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:20,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:20,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:20,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:20,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:20,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:20,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:20,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:20,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:20,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:20,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:20,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:20,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:20,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:20,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594451556] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:20,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:20,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:20,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326109180] [2022-02-10 03:07:20,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:20,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:20,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:20,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:20,690 INFO L87 Difference]: Start difference. First operand 522 states and 1363 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:20,982 INFO L93 Difference]: Finished difference Result 618 states and 1558 transitions. [2022-02-10 03:07:20,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:07:20,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:20,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:20,983 INFO L225 Difference]: With dead ends: 618 [2022-02-10 03:07:20,983 INFO L226 Difference]: Without dead ends: 618 [2022-02-10 03:07:20,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:07:20,983 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:20,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 151 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 478 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-02-10 03:07:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-02-10 03:07:20,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 534. [2022-02-10 03:07:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 2.6360225140712945) internal successors, (1405), 533 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1405 transitions. [2022-02-10 03:07:20,989 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1405 transitions. Word has length 25 [2022-02-10 03:07:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:20,989 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1405 transitions. [2022-02-10 03:07:20,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1405 transitions. [2022-02-10 03:07:20,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:20,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:20,990 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:21,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-02-10 03:07:21,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:21,190 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:21,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1575943517, now seen corresponding path program 172 times [2022-02-10 03:07:21,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:21,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873657219] [2022-02-10 03:07:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:21,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:21,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:21,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873657219] [2022-02-10 03:07:21,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873657219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:21,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966238375] [2022-02-10 03:07:21,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:21,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:21,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:21,320 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:21,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-10 03:07:21,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:21,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:21,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:21,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:21,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:21,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:21,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:21,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:21,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:21,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:21,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:21,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:21,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:21,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:21,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966238375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:21,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:21,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:21,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419088168] [2022-02-10 03:07:21,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:21,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:21,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:21,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:21,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:21,949 INFO L87 Difference]: Start difference. First operand 534 states and 1405 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:22,327 INFO L93 Difference]: Finished difference Result 642 states and 1609 transitions. [2022-02-10 03:07:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:07:22,328 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:22,329 INFO L225 Difference]: With dead ends: 642 [2022-02-10 03:07:22,329 INFO L226 Difference]: Without dead ends: 642 [2022-02-10 03:07:22,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:07:22,329 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:22,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 171 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 486 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-02-10 03:07:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-10 03:07:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 533. [2022-02-10 03:07:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.6353383458646618) internal successors, (1402), 532 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1402 transitions. [2022-02-10 03:07:22,337 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1402 transitions. Word has length 25 [2022-02-10 03:07:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:22,338 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 1402 transitions. [2022-02-10 03:07:22,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1402 transitions. [2022-02-10 03:07:22,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:22,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:22,339 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:22,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:22,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-02-10 03:07:22,561 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:22,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1989739001, now seen corresponding path program 173 times [2022-02-10 03:07:22,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:22,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707106067] [2022-02-10 03:07:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:22,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:22,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:22,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707106067] [2022-02-10 03:07:22,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707106067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:22,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647688053] [2022-02-10 03:07:22,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:22,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:22,702 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:22,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-10 03:07:22,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:07:22,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:22,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:22,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:22,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:22,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:22,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:07:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:23,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:23,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:23,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:23,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:23,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:23,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:23,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:23,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647688053] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:23,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:23,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:23,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824947522] [2022-02-10 03:07:23,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:23,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:23,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:23,278 INFO L87 Difference]: Start difference. First operand 533 states and 1402 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:23,589 INFO L93 Difference]: Finished difference Result 619 states and 1589 transitions. [2022-02-10 03:07:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:07:23,589 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:23,590 INFO L225 Difference]: With dead ends: 619 [2022-02-10 03:07:23,590 INFO L226 Difference]: Without dead ends: 619 [2022-02-10 03:07:23,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:07:23,590 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:23,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 163 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 467 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-02-10 03:07:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-10 03:07:23,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 523. [2022-02-10 03:07:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.6187739463601534) internal successors, (1367), 522 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1367 transitions. [2022-02-10 03:07:23,597 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1367 transitions. Word has length 25 [2022-02-10 03:07:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:23,597 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 1367 transitions. [2022-02-10 03:07:23,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1367 transitions. [2022-02-10 03:07:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:23,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:23,598 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:23,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:23,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2022-02-10 03:07:23,820 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1549807217, now seen corresponding path program 174 times [2022-02-10 03:07:23,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:23,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507590775] [2022-02-10 03:07:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:23,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:23,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:23,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507590775] [2022-02-10 03:07:23,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507590775] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:23,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220028346] [2022-02-10 03:07:23,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:23,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:23,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:23,934 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:23,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-10 03:07:23,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:07:23,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:23,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:24,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:24,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:24,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:24,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:24,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:24,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:24,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:24,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:24,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:24,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:24,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:24,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:24,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:24,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220028346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:24,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:24,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:24,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353091171] [2022-02-10 03:07:24,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:24,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:24,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:24,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:24,522 INFO L87 Difference]: Start difference. First operand 523 states and 1367 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:24,714 INFO L93 Difference]: Finished difference Result 592 states and 1501 transitions. [2022-02-10 03:07:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:07:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:24,715 INFO L225 Difference]: With dead ends: 592 [2022-02-10 03:07:24,715 INFO L226 Difference]: Without dead ends: 592 [2022-02-10 03:07:24,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:24,715 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:24,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 137 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 416 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-02-10 03:07:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-10 03:07:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 532. [2022-02-10 03:07:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.634651600753296) internal successors, (1399), 531 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1399 transitions. [2022-02-10 03:07:24,722 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1399 transitions. Word has length 25 [2022-02-10 03:07:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:24,722 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1399 transitions. [2022-02-10 03:07:24,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1399 transitions. [2022-02-10 03:07:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:24,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:24,723 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:24,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:24,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:24,927 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:24,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1254545487, now seen corresponding path program 175 times [2022-02-10 03:07:24,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:24,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142132470] [2022-02-10 03:07:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:24,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:25,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:25,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142132470] [2022-02-10 03:07:25,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142132470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:25,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095927640] [2022-02-10 03:07:25,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:25,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:25,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:25,045 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:25,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-10 03:07:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:25,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:25,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:25,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:25,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:25,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:25,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:25,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:25,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:25,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:25,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:25,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:25,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:25,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:25,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:25,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095927640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:25,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:25,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:25,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137722484] [2022-02-10 03:07:25,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:25,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:25,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:25,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:25,590 INFO L87 Difference]: Start difference. First operand 532 states and 1399 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:25,739 INFO L93 Difference]: Finished difference Result 593 states and 1513 transitions. [2022-02-10 03:07:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:25,740 INFO L225 Difference]: With dead ends: 593 [2022-02-10 03:07:25,740 INFO L226 Difference]: Without dead ends: 593 [2022-02-10 03:07:25,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:25,740 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:25,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 133 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 389 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-02-10 03:07:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-02-10 03:07:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 524. [2022-02-10 03:07:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.621414913957935) internal successors, (1371), 523 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:25,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1371 transitions. [2022-02-10 03:07:25,748 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1371 transitions. Word has length 25 [2022-02-10 03:07:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:25,749 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1371 transitions. [2022-02-10 03:07:25,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1371 transitions. [2022-02-10 03:07:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:25,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:25,750 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:25,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:25,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:25,973 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:25,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1955081535, now seen corresponding path program 176 times [2022-02-10 03:07:25,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:25,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255232916] [2022-02-10 03:07:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:25,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:26,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:26,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255232916] [2022-02-10 03:07:26,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255232916] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:26,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291192297] [2022-02-10 03:07:26,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:26,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:26,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:26,091 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:26,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-10 03:07:26,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:26,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:26,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:26,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:26,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:26,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:26,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:26,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:07:26,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:26,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2022-02-10 03:07:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:26,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:26,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:26,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:26,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:26,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:26,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:26,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:26,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291192297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:26,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:26,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:26,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633311204] [2022-02-10 03:07:26,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:26,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:26,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:26,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:26,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:26,737 INFO L87 Difference]: Start difference. First operand 524 states and 1371 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:26,860 INFO L93 Difference]: Finished difference Result 573 states and 1468 transitions. [2022-02-10 03:07:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:26,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:26,861 INFO L225 Difference]: With dead ends: 573 [2022-02-10 03:07:26,861 INFO L226 Difference]: Without dead ends: 573 [2022-02-10 03:07:26,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:26,861 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:26,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 323 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-02-10 03:07:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-02-10 03:07:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 530. [2022-02-10 03:07:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.6219281663516067) internal successors, (1387), 529 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1387 transitions. [2022-02-10 03:07:26,867 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1387 transitions. Word has length 25 [2022-02-10 03:07:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:26,867 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1387 transitions. [2022-02-10 03:07:26,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1387 transitions. [2022-02-10 03:07:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:26,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:26,867 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:26,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:27,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:27,068 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1490216949, now seen corresponding path program 177 times [2022-02-10 03:07:27,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:27,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544321436] [2022-02-10 03:07:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:27,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:27,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:27,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544321436] [2022-02-10 03:07:27,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544321436] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:27,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103380377] [2022-02-10 03:07:27,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:27,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:27,191 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:27,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-10 03:07:27,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:27,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:27,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:27,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:27,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:27,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:27,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:27,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:27,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:07:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:27,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:27,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:27,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:27,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:27,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:27,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:27,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:27,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103380377] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:27,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:27,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:27,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186755782] [2022-02-10 03:07:27,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:27,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:27,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:27,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:27,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:27,839 INFO L87 Difference]: Start difference. First operand 530 states and 1387 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:27,952 INFO L93 Difference]: Finished difference Result 592 states and 1507 transitions. [2022-02-10 03:07:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:27,953 INFO L225 Difference]: With dead ends: 592 [2022-02-10 03:07:27,953 INFO L226 Difference]: Without dead ends: 592 [2022-02-10 03:07:27,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:27,954 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:27,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 130 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 305 Invalid, 0 Unknown, 140 Unchecked, 0.1s Time] [2022-02-10 03:07:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-10 03:07:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 524. [2022-02-10 03:07:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.621414913957935) internal successors, (1371), 523 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1371 transitions. [2022-02-10 03:07:27,959 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1371 transitions. Word has length 25 [2022-02-10 03:07:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:27,959 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1371 transitions. [2022-02-10 03:07:27,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1371 transitions. [2022-02-10 03:07:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:27,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:27,960 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:27,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-02-10 03:07:28,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:28,164 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:28,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2053395987, now seen corresponding path program 178 times [2022-02-10 03:07:28,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:28,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296779648] [2022-02-10 03:07:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:28,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:28,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:28,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296779648] [2022-02-10 03:07:28,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296779648] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:28,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46935787] [2022-02-10 03:07:28,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:28,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:28,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:28,276 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:28,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-10 03:07:28,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:28,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:28,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:28,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:28,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:28,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:28,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:28,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:28,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:07:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:28,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:28,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:28,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:28,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:28,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:28,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:28,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:28,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46935787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:28,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:28,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:28,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114904750] [2022-02-10 03:07:28,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:28,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:28,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:28,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:28,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:28,839 INFO L87 Difference]: Start difference. First operand 524 states and 1371 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:28,926 INFO L93 Difference]: Finished difference Result 589 states and 1497 transitions. [2022-02-10 03:07:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:28,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:28,928 INFO L225 Difference]: With dead ends: 589 [2022-02-10 03:07:28,928 INFO L226 Difference]: Without dead ends: 589 [2022-02-10 03:07:28,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:28,928 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:28,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 94 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-02-10 03:07:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-02-10 03:07:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 525. [2022-02-10 03:07:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.6240458015267176) internal successors, (1375), 524 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1375 transitions. [2022-02-10 03:07:28,934 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1375 transitions. Word has length 25 [2022-02-10 03:07:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:28,935 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1375 transitions. [2022-02-10 03:07:28,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1375 transitions. [2022-02-10 03:07:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:28,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:28,935 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:28,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-02-10 03:07:29,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:29,136 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1488224523, now seen corresponding path program 179 times [2022-02-10 03:07:29,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:29,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5443007] [2022-02-10 03:07:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:29,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:29,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:29,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5443007] [2022-02-10 03:07:29,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5443007] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:29,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016394558] [2022-02-10 03:07:29,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:29,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:29,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:29,237 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:29,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-10 03:07:29,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:07:29,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:29,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:29,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:29,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:07:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:29,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:29,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:29,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:29,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:29,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:29,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:29,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:29,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016394558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:29,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:29,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:29,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646431261] [2022-02-10 03:07:29,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:29,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:29,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:29,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:29,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:29,687 INFO L87 Difference]: Start difference. First operand 525 states and 1375 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:29,976 INFO L93 Difference]: Finished difference Result 696 states and 1733 transitions. [2022-02-10 03:07:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:07:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:29,978 INFO L225 Difference]: With dead ends: 696 [2022-02-10 03:07:29,978 INFO L226 Difference]: Without dead ends: 696 [2022-02-10 03:07:29,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:29,978 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:29,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 200 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:07:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-02-10 03:07:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 534. [2022-02-10 03:07:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 2.651031894934334) internal successors, (1413), 533 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1413 transitions. [2022-02-10 03:07:29,992 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1413 transitions. Word has length 25 [2022-02-10 03:07:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:29,992 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1413 transitions. [2022-02-10 03:07:29,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1413 transitions. [2022-02-10 03:07:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:29,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:29,993 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:30,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-02-10 03:07:30,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:30,193 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:30,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1078289679, now seen corresponding path program 180 times [2022-02-10 03:07:30,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:30,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071520347] [2022-02-10 03:07:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:30,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:30,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:30,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071520347] [2022-02-10 03:07:30,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071520347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:30,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403935674] [2022-02-10 03:07:30,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:30,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:30,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:30,348 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:30,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-10 03:07:30,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:07:30,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:30,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:30,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:30,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:07:30,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:30,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:07:30,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:30,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:07:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:30,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:30,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:30,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:07:30,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:30,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:30,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:30,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:07:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:30,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403935674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:30,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:30,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:07:30,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293270857] [2022-02-10 03:07:30,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:30,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:30,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:30,746 INFO L87 Difference]: Start difference. First operand 534 states and 1413 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:31,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:31,014 INFO L93 Difference]: Finished difference Result 558 states and 1449 transitions. [2022-02-10 03:07:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:31,014 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:31,015 INFO L225 Difference]: With dead ends: 558 [2022-02-10 03:07:31,015 INFO L226 Difference]: Without dead ends: 556 [2022-02-10 03:07:31,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:07:31,015 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:31,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 78 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 300 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-02-10 03:07:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-02-10 03:07:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 537. [2022-02-10 03:07:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 2.6417910447761193) internal successors, (1416), 536 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1416 transitions. [2022-02-10 03:07:31,022 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1416 transitions. Word has length 25 [2022-02-10 03:07:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:31,023 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1416 transitions. [2022-02-10 03:07:31,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1416 transitions. [2022-02-10 03:07:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:31,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:31,024 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:31,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:31,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2022-02-10 03:07:31,246 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash 140164957, now seen corresponding path program 181 times [2022-02-10 03:07:31,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:31,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960297079] [2022-02-10 03:07:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:31,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:31,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:31,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960297079] [2022-02-10 03:07:31,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960297079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:31,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909117617] [2022-02-10 03:07:31,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:31,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:31,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:31,362 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:31,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-10 03:07:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:31,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:31,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:07:31,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:31,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:07:31,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:31,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:07:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:31,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:31,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:31,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:07:31,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:31,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2022-02-10 03:07:31,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:31,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-10 03:07:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:31,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909117617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:31,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:31,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:07:31,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110877044] [2022-02-10 03:07:31,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:31,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:07:31,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:31,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:07:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:07:31,832 INFO L87 Difference]: Start difference. First operand 537 states and 1416 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:32,019 INFO L93 Difference]: Finished difference Result 575 states and 1470 transitions. [2022-02-10 03:07:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:32,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:32,021 INFO L225 Difference]: With dead ends: 575 [2022-02-10 03:07:32,021 INFO L226 Difference]: Without dead ends: 571 [2022-02-10 03:07:32,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:32,021 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:32,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 89 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 344 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-02-10 03:07:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-02-10 03:07:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 542. [2022-02-10 03:07:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.6284658040665434) internal successors, (1422), 541 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1422 transitions. [2022-02-10 03:07:32,026 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1422 transitions. Word has length 25 [2022-02-10 03:07:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:32,027 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1422 transitions. [2022-02-10 03:07:32,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1422 transitions. [2022-02-10 03:07:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:32,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:32,027 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:32,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-02-10 03:07:32,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:32,228 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:32,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2000995071, now seen corresponding path program 182 times [2022-02-10 03:07:32,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:32,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458810541] [2022-02-10 03:07:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:32,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:32,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:32,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458810541] [2022-02-10 03:07:32,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458810541] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:32,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803010514] [2022-02-10 03:07:32,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:32,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:32,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:32,348 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:32,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-10 03:07:32,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:32,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:32,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:32,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:32,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-02-10 03:07:32,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-02-10 03:07:32,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-10 03:07:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:32,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:32,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:32,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:07:32,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:32,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:32,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:32,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:07:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:32,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803010514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:32,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:32,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-10 03:07:32,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115817276] [2022-02-10 03:07:32,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:32,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:07:32,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:07:32,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:07:32,668 INFO L87 Difference]: Start difference. First operand 542 states and 1422 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:32,862 INFO L93 Difference]: Finished difference Result 563 states and 1452 transitions. [2022-02-10 03:07:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:32,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:32,863 INFO L225 Difference]: With dead ends: 563 [2022-02-10 03:07:32,863 INFO L226 Difference]: Without dead ends: 553 [2022-02-10 03:07:32,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:07:32,864 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:32,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 78 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:07:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-02-10 03:07:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 534. [2022-02-10 03:07:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 2.649155722326454) internal successors, (1412), 533 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:32,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1412 transitions. [2022-02-10 03:07:32,869 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1412 transitions. Word has length 25 [2022-02-10 03:07:32,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:32,869 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1412 transitions. [2022-02-10 03:07:32,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1412 transitions. [2022-02-10 03:07:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:32,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:32,869 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:32,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-02-10 03:07:33,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-02-10 03:07:33,070 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash -920404349, now seen corresponding path program 183 times [2022-02-10 03:07:33,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:33,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481948584] [2022-02-10 03:07:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:33,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:33,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:33,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481948584] [2022-02-10 03:07:33,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481948584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:33,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614546464] [2022-02-10 03:07:33,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:33,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:33,184 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:33,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-10 03:07:33,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:33,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:33,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:33,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:33,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:33,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:33,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:07:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:33,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:33,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:33,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:33,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:33,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:33,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:33,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:33,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614546464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:33,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:33,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:33,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617824919] [2022-02-10 03:07:33,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:33,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:33,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:33,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:33,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:33,735 INFO L87 Difference]: Start difference. First operand 534 states and 1412 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:33,858 INFO L93 Difference]: Finished difference Result 619 states and 1572 transitions. [2022-02-10 03:07:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:33,859 INFO L225 Difference]: With dead ends: 619 [2022-02-10 03:07:33,859 INFO L226 Difference]: Without dead ends: 619 [2022-02-10 03:07:33,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:33,860 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:33,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 179 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 291 Unchecked, 0.1s Time] [2022-02-10 03:07:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-10 03:07:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 525. [2022-02-10 03:07:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.622137404580153) internal successors, (1374), 524 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1374 transitions. [2022-02-10 03:07:33,865 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1374 transitions. Word has length 25 [2022-02-10 03:07:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:33,865 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1374 transitions. [2022-02-10 03:07:33,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1374 transitions. [2022-02-10 03:07:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:33,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:33,866 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:33,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-02-10 03:07:34,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-02-10 03:07:34,068 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1673751135, now seen corresponding path program 184 times [2022-02-10 03:07:34,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:34,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947882806] [2022-02-10 03:07:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:34,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:34,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:34,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947882806] [2022-02-10 03:07:34,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947882806] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:34,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018052245] [2022-02-10 03:07:34,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:34,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:34,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:34,164 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:34,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-10 03:07:34,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:34,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:34,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:34,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:34,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:07:34,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:07:34,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:07:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:34,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:34,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:34,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:34,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:34,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:34,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:34,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:34,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018052245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:34,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:34,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:07:34,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896317348] [2022-02-10 03:07:34,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:34,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:34,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:34,610 INFO L87 Difference]: Start difference. First operand 525 states and 1374 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:34,818 INFO L93 Difference]: Finished difference Result 636 states and 1613 transitions. [2022-02-10 03:07:34,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:34,818 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:34,819 INFO L225 Difference]: With dead ends: 636 [2022-02-10 03:07:34,819 INFO L226 Difference]: Without dead ends: 636 [2022-02-10 03:07:34,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:34,820 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:34,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 143 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:07:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-02-10 03:07:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 524. [2022-02-10 03:07:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.6195028680688335) internal successors, (1370), 523 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1370 transitions. [2022-02-10 03:07:34,826 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1370 transitions. Word has length 25 [2022-02-10 03:07:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:34,826 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1370 transitions. [2022-02-10 03:07:34,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1370 transitions. [2022-02-10 03:07:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:34,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:34,827 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:34,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-02-10 03:07:35,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:35,029 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1093799537, now seen corresponding path program 185 times [2022-02-10 03:07:35,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:35,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141816115] [2022-02-10 03:07:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:35,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:35,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:35,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141816115] [2022-02-10 03:07:35,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141816115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:35,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566200364] [2022-02-10 03:07:35,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:35,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:35,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:35,154 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:35,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-10 03:07:35,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:07:35,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:35,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:35,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:35,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:35,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:35,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:35,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:07:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:35,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:35,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:35,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:35,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:35,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:35,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:35,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:35,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566200364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:35,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:35,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:35,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194027380] [2022-02-10 03:07:35,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:35,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:35,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:35,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:35,633 INFO L87 Difference]: Start difference. First operand 524 states and 1370 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:35,865 INFO L93 Difference]: Finished difference Result 581 states and 1484 transitions. [2022-02-10 03:07:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:35,866 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:35,867 INFO L225 Difference]: With dead ends: 581 [2022-02-10 03:07:35,867 INFO L226 Difference]: Without dead ends: 581 [2022-02-10 03:07:35,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:07:35,867 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:35,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 148 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 461 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-02-10 03:07:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-02-10 03:07:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 524. [2022-02-10 03:07:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.6195028680688335) internal successors, (1370), 523 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1370 transitions. [2022-02-10 03:07:35,872 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1370 transitions. Word has length 25 [2022-02-10 03:07:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:35,872 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1370 transitions. [2022-02-10 03:07:35,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1370 transitions. [2022-02-10 03:07:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:35,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:35,873 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:35,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-02-10 03:07:36,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:36,074 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:36,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1122972939, now seen corresponding path program 186 times [2022-02-10 03:07:36,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:36,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71364550] [2022-02-10 03:07:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:36,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:36,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:36,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71364550] [2022-02-10 03:07:36,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71364550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:36,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963173681] [2022-02-10 03:07:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:36,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:36,169 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:36,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-10 03:07:36,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:07:36,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:36,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:36,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:36,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:07:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:36,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:36,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:36,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:36,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:36,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:36,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:36,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:36,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963173681] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:36,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:36,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:07:36,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158224386] [2022-02-10 03:07:36,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:36,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:36,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:36,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:36,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:36,520 INFO L87 Difference]: Start difference. First operand 524 states and 1370 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:36,658 INFO L93 Difference]: Finished difference Result 546 states and 1425 transitions. [2022-02-10 03:07:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:36,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:36,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:36,660 INFO L225 Difference]: With dead ends: 546 [2022-02-10 03:07:36,660 INFO L226 Difference]: Without dead ends: 546 [2022-02-10 03:07:36,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:36,660 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:36,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 85 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:07:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-02-10 03:07:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 527. [2022-02-10 03:07:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.6216730038022815) internal successors, (1379), 526 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1379 transitions. [2022-02-10 03:07:36,667 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1379 transitions. Word has length 25 [2022-02-10 03:07:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:36,667 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 1379 transitions. [2022-02-10 03:07:36,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1379 transitions. [2022-02-10 03:07:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:36,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:36,668 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:36,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-02-10 03:07:36,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2022-02-10 03:07:36,868 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:36,868 INFO L85 PathProgramCache]: Analyzing trace with hash 827711209, now seen corresponding path program 187 times [2022-02-10 03:07:36,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:36,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319008814] [2022-02-10 03:07:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:36,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:36,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:36,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319008814] [2022-02-10 03:07:36,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319008814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:36,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366104294] [2022-02-10 03:07:36,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:36,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:36,980 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:36,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-10 03:07:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:37,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:37,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:37,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:37,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:37,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:37,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:37,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:37,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:07:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:37,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:37,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:37,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:37,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:37,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:37,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:37,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:37,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366104294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:37,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:37,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:37,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268483747] [2022-02-10 03:07:37,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:37,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:37,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:37,510 INFO L87 Difference]: Start difference. First operand 527 states and 1379 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:37,629 INFO L93 Difference]: Finished difference Result 572 states and 1468 transitions. [2022-02-10 03:07:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:37,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:37,630 INFO L225 Difference]: With dead ends: 572 [2022-02-10 03:07:37,630 INFO L226 Difference]: Without dead ends: 572 [2022-02-10 03:07:37,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:37,631 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:37,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 127 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 323 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-02-10 03:07:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-02-10 03:07:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 528. [2022-02-10 03:07:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.6223908918406074) internal successors, (1382), 527 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1382 transitions. [2022-02-10 03:07:37,636 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1382 transitions. Word has length 25 [2022-02-10 03:07:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:37,636 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1382 transitions. [2022-02-10 03:07:37,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1382 transitions. [2022-02-10 03:07:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:37,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:37,637 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:37,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-02-10 03:07:37,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:37,838 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:37,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1556995987, now seen corresponding path program 188 times [2022-02-10 03:07:37,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:37,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24852500] [2022-02-10 03:07:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:37,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:37,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:37,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24852500] [2022-02-10 03:07:37,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24852500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:37,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473690736] [2022-02-10 03:07:37,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:37,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:37,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:37,949 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:37,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-10 03:07:37,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:37,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:37,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:38,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:07:38,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:07:38,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:07:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:38,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:38,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:38,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:38,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:38,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:38,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:38,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:38,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473690736] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:38,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:38,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:07:38,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29952300] [2022-02-10 03:07:38,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:38,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:38,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:38,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:38,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:38,349 INFO L87 Difference]: Start difference. First operand 528 states and 1382 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:38,582 INFO L93 Difference]: Finished difference Result 579 states and 1485 transitions. [2022-02-10 03:07:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:38,584 INFO L225 Difference]: With dead ends: 579 [2022-02-10 03:07:38,584 INFO L226 Difference]: Without dead ends: 579 [2022-02-10 03:07:38,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:38,584 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:38,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 142 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:07:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-02-10 03:07:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 529. [2022-02-10 03:07:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.625) internal successors, (1386), 528 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1386 transitions. [2022-02-10 03:07:38,589 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1386 transitions. Word has length 25 [2022-02-10 03:07:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:38,589 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1386 transitions. [2022-02-10 03:07:38,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1386 transitions. [2022-02-10 03:07:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:38,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:38,590 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:38,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:38,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:38,812 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:38,813 INFO L85 PathProgramCache]: Analyzing trace with hash 801574909, now seen corresponding path program 189 times [2022-02-10 03:07:38,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:38,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610639209] [2022-02-10 03:07:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:38,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:38,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:38,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610639209] [2022-02-10 03:07:38,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610639209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:38,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257157974] [2022-02-10 03:07:38,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:38,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:38,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:38,919 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:38,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-10 03:07:38,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:38,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:38,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:38,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:39,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:39,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:39,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:39,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:39,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:39,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:39,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:39,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:39,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257157974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:39,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:39,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:07:39,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889168950] [2022-02-10 03:07:39,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:39,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:39,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:39,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:39,424 INFO L87 Difference]: Start difference. First operand 529 states and 1386 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:39,564 INFO L93 Difference]: Finished difference Result 561 states and 1468 transitions. [2022-02-10 03:07:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:07:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:39,565 INFO L225 Difference]: With dead ends: 561 [2022-02-10 03:07:39,565 INFO L226 Difference]: Without dead ends: 561 [2022-02-10 03:07:39,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:39,566 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:39,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 85 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 319 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-02-10 03:07:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-02-10 03:07:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 530. [2022-02-10 03:07:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.6257088846880907) internal successors, (1389), 529 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1389 transitions. [2022-02-10 03:07:39,583 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1389 transitions. Word has length 25 [2022-02-10 03:07:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:39,583 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1389 transitions. [2022-02-10 03:07:39,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1389 transitions. [2022-02-10 03:07:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:39,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:39,584 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:39,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-02-10 03:07:39,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:39,806 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:39,807 INFO L85 PathProgramCache]: Analyzing trace with hash 506313179, now seen corresponding path program 190 times [2022-02-10 03:07:39,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:39,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644154949] [2022-02-10 03:07:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:39,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:39,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:39,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644154949] [2022-02-10 03:07:39,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644154949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:39,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380453379] [2022-02-10 03:07:39,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:39,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:39,920 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:39,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-10 03:07:39,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:39,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:39,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:40,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:40,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:40,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:40,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:07:40,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:40,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2022-02-10 03:07:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:40,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:40,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:40,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:40,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:40,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:40,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:40,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:40,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380453379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:40,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:40,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:40,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610737114] [2022-02-10 03:07:40,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:40,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:40,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:40,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:40,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:40,690 INFO L87 Difference]: Start difference. First operand 530 states and 1389 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:40,820 INFO L93 Difference]: Finished difference Result 546 states and 1429 transitions. [2022-02-10 03:07:40,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:40,820 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:40,821 INFO L225 Difference]: With dead ends: 546 [2022-02-10 03:07:40,821 INFO L226 Difference]: Without dead ends: 546 [2022-02-10 03:07:40,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:40,821 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:40,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 109 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 349 Invalid, 0 Unknown, 168 Unchecked, 0.1s Time] [2022-02-10 03:07:40,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-02-10 03:07:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 530. [2022-02-10 03:07:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.6257088846880907) internal successors, (1389), 529 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1389 transitions. [2022-02-10 03:07:40,827 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1389 transitions. Word has length 25 [2022-02-10 03:07:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:40,827 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1389 transitions. [2022-02-10 03:07:40,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1389 transitions. [2022-02-10 03:07:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:40,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:40,828 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:40,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-02-10 03:07:41,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:41,028 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:41,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1206849227, now seen corresponding path program 191 times [2022-02-10 03:07:41,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:41,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883621233] [2022-02-10 03:07:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:41,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:41,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:41,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883621233] [2022-02-10 03:07:41,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883621233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:41,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797865746] [2022-02-10 03:07:41,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:41,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:41,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:41,124 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:41,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-10 03:07:41,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:07:41,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:41,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:41,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:41,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:41,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:41,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:41,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:41,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:41,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:41,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:41,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:41,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:41,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797865746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:41,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:41,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:07:41,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226972313] [2022-02-10 03:07:41,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:41,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:07:41,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:41,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:07:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:07:41,592 INFO L87 Difference]: Start difference. First operand 530 states and 1389 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:41,742 INFO L93 Difference]: Finished difference Result 572 states and 1497 transitions. [2022-02-10 03:07:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:07:41,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:41,744 INFO L225 Difference]: With dead ends: 572 [2022-02-10 03:07:41,744 INFO L226 Difference]: Without dead ends: 572 [2022-02-10 03:07:41,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:41,744 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:41,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 106 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 345 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-02-10 03:07:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-02-10 03:07:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 530. [2022-02-10 03:07:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.6257088846880907) internal successors, (1389), 529 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:41,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1389 transitions. [2022-02-10 03:07:41,749 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1389 transitions. Word has length 25 [2022-02-10 03:07:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:41,749 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1389 transitions. [2022-02-10 03:07:41,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1389 transitions. [2022-02-10 03:07:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:41,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:41,750 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:41,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-02-10 03:07:41,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:41,951 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:41,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1895046751, now seen corresponding path program 192 times [2022-02-10 03:07:41,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:41,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214397450] [2022-02-10 03:07:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:41,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:42,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:42,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214397450] [2022-02-10 03:07:42,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214397450] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:42,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365637499] [2022-02-10 03:07:42,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:42,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:42,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:42,064 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:42,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-10 03:07:42,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:07:42,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:42,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:42,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:42,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:42,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:42,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:42,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:42,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:42,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:42,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:42,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:42,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:42,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:42,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:42,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:42,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365637499] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:42,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:42,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:07:42,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852731935] [2022-02-10 03:07:42,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:42,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:42,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:42,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:42,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:42,728 INFO L87 Difference]: Start difference. First operand 530 states and 1389 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:42,949 INFO L93 Difference]: Finished difference Result 596 states and 1519 transitions. [2022-02-10 03:07:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:07:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:42,950 INFO L225 Difference]: With dead ends: 596 [2022-02-10 03:07:42,950 INFO L226 Difference]: Without dead ends: 580 [2022-02-10 03:07:42,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:42,950 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:42,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 152 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 412 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-02-10 03:07:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-10 03:07:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 545. [2022-02-10 03:07:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.641544117647059) internal successors, (1437), 544 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1437 transitions. [2022-02-10 03:07:42,956 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1437 transitions. Word has length 25 [2022-02-10 03:07:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:42,956 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1437 transitions. [2022-02-10 03:07:42,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1437 transitions. [2022-02-10 03:07:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:42,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:42,958 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:42,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:43,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-02-10 03:07:43,180 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1926377701, now seen corresponding path program 193 times [2022-02-10 03:07:43,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:43,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779548374] [2022-02-10 03:07:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:43,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:43,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:43,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779548374] [2022-02-10 03:07:43,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779548374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:43,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746942759] [2022-02-10 03:07:43,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:43,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:43,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:43,340 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:43,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-10 03:07:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:43,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:43,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:43,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:43,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:43,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:07:43,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:43,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:07:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:43,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:43,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:43,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:43,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:43,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:43,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:43,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:43,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746942759] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:43,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:43,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:43,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955953298] [2022-02-10 03:07:43,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:43,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:43,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:43,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:43,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:43,956 INFO L87 Difference]: Start difference. First operand 545 states and 1437 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:44,099 INFO L93 Difference]: Finished difference Result 591 states and 1530 transitions. [2022-02-10 03:07:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:44,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:44,100 INFO L225 Difference]: With dead ends: 591 [2022-02-10 03:07:44,100 INFO L226 Difference]: Without dead ends: 591 [2022-02-10 03:07:44,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:44,101 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:44,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 126 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 372 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-02-10 03:07:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-02-10 03:07:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 546. [2022-02-10 03:07:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.6440366972477065) internal successors, (1441), 545 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1441 transitions. [2022-02-10 03:07:44,107 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1441 transitions. Word has length 25 [2022-02-10 03:07:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:44,107 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1441 transitions. [2022-02-10 03:07:44,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1441 transitions. [2022-02-10 03:07:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:44,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:44,108 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:44,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-02-10 03:07:44,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-10 03:07:44,308 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:44,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:44,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1521103383, now seen corresponding path program 194 times [2022-02-10 03:07:44,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:44,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103811749] [2022-02-10 03:07:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:44,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:44,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:44,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103811749] [2022-02-10 03:07:44,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103811749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:44,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865082741] [2022-02-10 03:07:44,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:44,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:44,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:44,466 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:44,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-10 03:07:44,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:44,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:44,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:44,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:44,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:44,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:44,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:44,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:44,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:44,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:44,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:44,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:45,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:45,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:45,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:45,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:45,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865082741] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:45,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:45,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:45,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911813528] [2022-02-10 03:07:45,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:45,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:45,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:45,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:45,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:45,120 INFO L87 Difference]: Start difference. First operand 546 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:45,474 INFO L93 Difference]: Finished difference Result 623 states and 1592 transitions. [2022-02-10 03:07:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:07:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:45,475 INFO L225 Difference]: With dead ends: 623 [2022-02-10 03:07:45,475 INFO L226 Difference]: Without dead ends: 623 [2022-02-10 03:07:45,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:07:45,476 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:45,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 142 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 514 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-02-10 03:07:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-10 03:07:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 551. [2022-02-10 03:07:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 2.658181818181818) internal successors, (1462), 550 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1462 transitions. [2022-02-10 03:07:45,481 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1462 transitions. Word has length 25 [2022-02-10 03:07:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:45,481 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 1462 transitions. [2022-02-10 03:07:45,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1462 transitions. [2022-02-10 03:07:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:45,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:45,482 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:45,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-02-10 03:07:45,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-02-10 03:07:45,683 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1668636657, now seen corresponding path program 195 times [2022-02-10 03:07:45,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:45,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259365442] [2022-02-10 03:07:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:45,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:45,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:45,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259365442] [2022-02-10 03:07:45,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259365442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:45,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758468463] [2022-02-10 03:07:45,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:45,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:45,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:45,824 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:45,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-10 03:07:45,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:07:45,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:07:45,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:45,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:45,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:46,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:46,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:46,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:46,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:46,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:46,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:46,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:46,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:46,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:46,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:46,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:46,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758468463] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:46,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:46,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 23 [2022-02-10 03:07:46,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961284957] [2022-02-10 03:07:46,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:46,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:07:46,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:07:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:46,485 INFO L87 Difference]: Start difference. First operand 551 states and 1462 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:46,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:46,727 INFO L93 Difference]: Finished difference Result 600 states and 1541 transitions. [2022-02-10 03:07:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:46,728 INFO L225 Difference]: With dead ends: 600 [2022-02-10 03:07:46,728 INFO L226 Difference]: Without dead ends: 592 [2022-02-10 03:07:46,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:07:46,729 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:46,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 137 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 363 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-02-10 03:07:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-10 03:07:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 545. [2022-02-10 03:07:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.641544117647059) internal successors, (1437), 544 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1437 transitions. [2022-02-10 03:07:46,734 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1437 transitions. Word has length 25 [2022-02-10 03:07:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:46,734 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1437 transitions. [2022-02-10 03:07:46,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1437 transitions. [2022-02-10 03:07:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:46,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:46,735 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:46,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-02-10 03:07:46,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-02-10 03:07:46,936 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash 816295055, now seen corresponding path program 196 times [2022-02-10 03:07:46,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:46,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547238584] [2022-02-10 03:07:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:46,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:47,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:47,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547238584] [2022-02-10 03:07:47,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547238584] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:47,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977685887] [2022-02-10 03:07:47,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:47,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:47,085 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:47,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-10 03:07:47,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:47,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:47,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:47,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:47,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:47,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:47,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:47,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:47,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:47,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:47,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:07:47,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:47,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:47,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:47,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:07:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:47,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977685887] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:47,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:47,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:47,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533170976] [2022-02-10 03:07:47,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:47,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:47,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:47,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:47,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:47,727 INFO L87 Difference]: Start difference. First operand 545 states and 1437 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:47,925 INFO L93 Difference]: Finished difference Result 598 states and 1548 transitions. [2022-02-10 03:07:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:47,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:47,927 INFO L225 Difference]: With dead ends: 598 [2022-02-10 03:07:47,927 INFO L226 Difference]: Without dead ends: 598 [2022-02-10 03:07:47,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:47,927 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:47,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 104 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 271 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-02-10 03:07:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-02-10 03:07:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 554. [2022-02-10 03:07:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.6582278481012658) internal successors, (1470), 553 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1470 transitions. [2022-02-10 03:07:47,932 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1470 transitions. Word has length 25 [2022-02-10 03:07:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:47,933 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1470 transitions. [2022-02-10 03:07:47,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1470 transitions. [2022-02-10 03:07:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:47,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:47,933 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:47,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-02-10 03:07:48,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-02-10 03:07:48,134 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:48,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:48,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1266928907, now seen corresponding path program 197 times [2022-02-10 03:07:48,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:48,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100337545] [2022-02-10 03:07:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:48,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:48,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:48,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100337545] [2022-02-10 03:07:48,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100337545] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:48,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513939276] [2022-02-10 03:07:48,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:48,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:48,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:48,276 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:48,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-10 03:07:48,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:07:48,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:48,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:48,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:48,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:48,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:48,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:48,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:48,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:48,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:48,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:48,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:48,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:48,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:48,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:48,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:48,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513939276] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:48,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:48,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:07:48,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514288116] [2022-02-10 03:07:48,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:48,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:07:48,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:48,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:07:48,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:07:48,842 INFO L87 Difference]: Start difference. First operand 554 states and 1470 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:49,080 INFO L93 Difference]: Finished difference Result 574 states and 1513 transitions. [2022-02-10 03:07:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:49,081 INFO L225 Difference]: With dead ends: 574 [2022-02-10 03:07:49,081 INFO L226 Difference]: Without dead ends: 570 [2022-02-10 03:07:49,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:49,082 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:49,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 239 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-02-10 03:07:49,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-10 03:07:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 554. [2022-02-10 03:07:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.6564195298372515) internal successors, (1469), 553 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1469 transitions. [2022-02-10 03:07:49,087 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1469 transitions. Word has length 25 [2022-02-10 03:07:49,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:49,087 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1469 transitions. [2022-02-10 03:07:49,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1469 transitions. [2022-02-10 03:07:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:49,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:49,088 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:49,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-02-10 03:07:49,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:49,288 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash 521033325, now seen corresponding path program 198 times [2022-02-10 03:07:49,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:49,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663611412] [2022-02-10 03:07:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:49,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:49,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:49,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663611412] [2022-02-10 03:07:49,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663611412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:49,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844287301] [2022-02-10 03:07:49,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:49,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:49,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:49,427 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:49,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-10 03:07:49,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:07:49,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:49,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:49,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:49,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:49,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:49,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:49,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:49,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:49,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:49,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:49,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:49,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:07:49,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:49,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:49,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:49,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:07:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:50,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844287301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:50,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:50,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:50,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305356115] [2022-02-10 03:07:50,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:50,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:50,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:50,032 INFO L87 Difference]: Start difference. First operand 554 states and 1469 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:50,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:50,262 INFO L93 Difference]: Finished difference Result 595 states and 1554 transitions. [2022-02-10 03:07:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:07:50,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:50,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:50,263 INFO L225 Difference]: With dead ends: 595 [2022-02-10 03:07:50,263 INFO L226 Difference]: Without dead ends: 595 [2022-02-10 03:07:50,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:07:50,264 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:50,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 96 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 329 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-02-10 03:07:50,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-10 03:07:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 546. [2022-02-10 03:07:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.6440366972477065) internal successors, (1441), 545 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1441 transitions. [2022-02-10 03:07:50,269 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1441 transitions. Word has length 25 [2022-02-10 03:07:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:50,270 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1441 transitions. [2022-02-10 03:07:50,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1441 transitions. [2022-02-10 03:07:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:50,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:50,270 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:50,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-02-10 03:07:50,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-02-10 03:07:50,471 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash 910574603, now seen corresponding path program 199 times [2022-02-10 03:07:50,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:50,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306399019] [2022-02-10 03:07:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:50,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:50,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:50,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306399019] [2022-02-10 03:07:50,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306399019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:50,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897495526] [2022-02-10 03:07:50,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:50,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:50,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:50,598 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:50,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-10 03:07:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:50,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:50,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:50,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:50,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:50,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:07:50,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:50,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-02-10 03:07:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:50,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:50,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:50,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-10 03:07:51,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:51,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:51,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:51,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:51,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897495526] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:51,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:51,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:07:51,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73073841] [2022-02-10 03:07:51,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:51,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:07:51,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:07:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:07:51,083 INFO L87 Difference]: Start difference. First operand 546 states and 1441 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:51,214 INFO L93 Difference]: Finished difference Result 557 states and 1456 transitions. [2022-02-10 03:07:51,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:51,215 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:51,216 INFO L225 Difference]: With dead ends: 557 [2022-02-10 03:07:51,216 INFO L226 Difference]: Without dead ends: 549 [2022-02-10 03:07:51,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:51,216 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:51,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 107 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 261 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-02-10 03:07:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-02-10 03:07:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 546. [2022-02-10 03:07:51,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.6422018348623855) internal successors, (1440), 545 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1440 transitions. [2022-02-10 03:07:51,221 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1440 transitions. Word has length 25 [2022-02-10 03:07:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:51,221 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1440 transitions. [2022-02-10 03:07:51,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1440 transitions. [2022-02-10 03:07:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:51,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:51,222 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:51,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-02-10 03:07:51,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-02-10 03:07:51,422 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1250318103, now seen corresponding path program 200 times [2022-02-10 03:07:51,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:51,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499940578] [2022-02-10 03:07:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:51,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:51,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:51,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499940578] [2022-02-10 03:07:51,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499940578] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:51,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32910435] [2022-02-10 03:07:51,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:51,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:51,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:51,580 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:51,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-10 03:07:51,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:51,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:51,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:51,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:51,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:51,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:51,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:51,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:07:51,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:51,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:07:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:51,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:52,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:52,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:07:52,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:52,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:52,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:52,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:07:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:52,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32910435] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:52,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:52,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:52,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119803177] [2022-02-10 03:07:52,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:52,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:52,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:52,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:52,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:52,239 INFO L87 Difference]: Start difference. First operand 546 states and 1440 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:52,488 INFO L93 Difference]: Finished difference Result 567 states and 1488 transitions. [2022-02-10 03:07:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:07:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:52,489 INFO L225 Difference]: With dead ends: 567 [2022-02-10 03:07:52,489 INFO L226 Difference]: Without dead ends: 567 [2022-02-10 03:07:52,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:07:52,489 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:52,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 96 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 265 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2022-02-10 03:07:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-02-10 03:07:52,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 545. [2022-02-10 03:07:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.641544117647059) internal successors, (1437), 544 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1437 transitions. [2022-02-10 03:07:52,495 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1437 transitions. Word has length 25 [2022-02-10 03:07:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:52,495 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1437 transitions. [2022-02-10 03:07:52,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1437 transitions. [2022-02-10 03:07:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:52,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:52,496 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:52,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-02-10 03:07:52,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:52,696 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:52,696 INFO L85 PathProgramCache]: Analyzing trace with hash 205893127, now seen corresponding path program 201 times [2022-02-10 03:07:52,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:52,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847344019] [2022-02-10 03:07:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:52,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:52,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:52,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847344019] [2022-02-10 03:07:52,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847344019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:52,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794727895] [2022-02-10 03:07:52,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:52,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:52,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:52,820 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:52,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-10 03:07:52,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:52,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:52,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:52,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:52,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:53,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:53,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:53,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:53,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:53,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:53,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:53,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:53,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:53,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:53,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:53,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794727895] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:53,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:53,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:53,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334520157] [2022-02-10 03:07:53,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:53,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:53,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:53,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:53,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:53,421 INFO L87 Difference]: Start difference. First operand 545 states and 1437 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:53,739 INFO L93 Difference]: Finished difference Result 622 states and 1600 transitions. [2022-02-10 03:07:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:07:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:53,740 INFO L225 Difference]: With dead ends: 622 [2022-02-10 03:07:53,740 INFO L226 Difference]: Without dead ends: 622 [2022-02-10 03:07:53,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:07:53,740 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:53,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 159 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 509 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-02-10 03:07:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-02-10 03:07:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 556. [2022-02-10 03:07:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.6576576576576576) internal successors, (1475), 555 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1475 transitions. [2022-02-10 03:07:53,746 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1475 transitions. Word has length 25 [2022-02-10 03:07:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:53,746 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1475 transitions. [2022-02-10 03:07:53,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1475 transitions. [2022-02-10 03:07:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:53,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:53,747 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:53,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-02-10 03:07:53,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:53,947 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:53,947 INFO L85 PathProgramCache]: Analyzing trace with hash -89368603, now seen corresponding path program 202 times [2022-02-10 03:07:53,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:53,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705166631] [2022-02-10 03:07:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:53,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:54,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:54,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705166631] [2022-02-10 03:07:54,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705166631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:54,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184076192] [2022-02-10 03:07:54,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:07:54,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:54,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:54,061 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:54,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-10 03:07:54,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:07:54,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:54,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:54,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:54,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:54,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:54,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:54,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:54,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:54,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:54,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:54,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:54,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:54,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:54,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184076192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:54,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:54,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:54,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520528609] [2022-02-10 03:07:54,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:54,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:54,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:54,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:54,550 INFO L87 Difference]: Start difference. First operand 556 states and 1475 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:54,974 INFO L93 Difference]: Finished difference Result 670 states and 1725 transitions. [2022-02-10 03:07:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:07:54,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:54,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:54,975 INFO L225 Difference]: With dead ends: 670 [2022-02-10 03:07:54,975 INFO L226 Difference]: Without dead ends: 670 [2022-02-10 03:07:54,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:07:54,976 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:54,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 179 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:07:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-02-10 03:07:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 561. [2022-02-10 03:07:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.6732142857142858) internal successors, (1497), 560 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1497 transitions. [2022-02-10 03:07:54,982 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1497 transitions. Word has length 25 [2022-02-10 03:07:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:54,982 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1497 transitions. [2022-02-10 03:07:54,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1497 transitions. [2022-02-10 03:07:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:54,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:54,983 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:54,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-02-10 03:07:55,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-02-10 03:07:55,183 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:55,183 INFO L85 PathProgramCache]: Analyzing trace with hash 639916175, now seen corresponding path program 203 times [2022-02-10 03:07:55,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:55,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492249245] [2022-02-10 03:07:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:55,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:55,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:55,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492249245] [2022-02-10 03:07:55,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492249245] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:55,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843795371] [2022-02-10 03:07:55,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:07:55,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:55,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:55,320 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:55,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-10 03:07:55,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:07:55,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:55,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:55,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:55,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:55,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:55,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:07:55,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:55,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:07:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:55,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:55,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:55,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:07:55,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:55,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:55,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:55,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:55,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843795371] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:55,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:55,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:55,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269497510] [2022-02-10 03:07:55,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:55,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:55,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:55,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:55,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:55,901 INFO L87 Difference]: Start difference. First operand 561 states and 1497 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:56,128 INFO L93 Difference]: Finished difference Result 600 states and 1594 transitions. [2022-02-10 03:07:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:07:56,128 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:56,129 INFO L225 Difference]: With dead ends: 600 [2022-02-10 03:07:56,129 INFO L226 Difference]: Without dead ends: 600 [2022-02-10 03:07:56,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:07:56,129 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:56,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 121 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 298 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-02-10 03:07:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-02-10 03:07:56,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 552. [2022-02-10 03:07:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.658802177858439) internal successors, (1465), 551 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1465 transitions. [2022-02-10 03:07:56,135 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1465 transitions. Word has length 25 [2022-02-10 03:07:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:56,135 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1465 transitions. [2022-02-10 03:07:56,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1465 transitions. [2022-02-10 03:07:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:56,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:56,136 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:56,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-02-10 03:07:56,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-10 03:07:56,336 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:56,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:56,336 INFO L85 PathProgramCache]: Analyzing trace with hash -115504903, now seen corresponding path program 204 times [2022-02-10 03:07:56,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:56,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918242622] [2022-02-10 03:07:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:56,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:56,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:56,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918242622] [2022-02-10 03:07:56,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918242622] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:56,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047398094] [2022-02-10 03:07:56,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:07:56,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:56,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:56,452 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:56,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-10 03:07:56,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:07:56,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:56,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:56,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:56,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:56,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:56,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:56,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:56,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:56,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:56,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:56,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:56,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:56,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:56,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:56,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:56,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:57,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047398094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:57,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:57,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:57,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753798248] [2022-02-10 03:07:57,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:57,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:57,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:57,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:57,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:57,023 INFO L87 Difference]: Start difference. First operand 552 states and 1465 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:57,220 INFO L93 Difference]: Finished difference Result 614 states and 1597 transitions. [2022-02-10 03:07:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:07:57,220 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:57,221 INFO L225 Difference]: With dead ends: 614 [2022-02-10 03:07:57,221 INFO L226 Difference]: Without dead ends: 614 [2022-02-10 03:07:57,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:57,221 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:57,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 121 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 331 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-02-10 03:07:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-02-10 03:07:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 562. [2022-02-10 03:07:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.6755793226381464) internal successors, (1501), 561 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1501 transitions. [2022-02-10 03:07:57,227 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1501 transitions. Word has length 25 [2022-02-10 03:07:57,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:57,227 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1501 transitions. [2022-02-10 03:07:57,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:57,227 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1501 transitions. [2022-02-10 03:07:57,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:57,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:57,228 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:57,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-02-10 03:07:57,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:57,428 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:57,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash -410766633, now seen corresponding path program 205 times [2022-02-10 03:07:57,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:57,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672669626] [2022-02-10 03:07:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:57,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:57,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:57,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672669626] [2022-02-10 03:07:57,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672669626] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:57,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600718900] [2022-02-10 03:07:57,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:07:57,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:57,528 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:57,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-10 03:07:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:57,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:57,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:57,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:07:57,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:07:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:57,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:57,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:57,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:07:57,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:57,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:57,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:57,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:07:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:57,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600718900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:57,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:57,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:07:57,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548710011] [2022-02-10 03:07:57,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:57,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:07:57,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:07:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:07:57,983 INFO L87 Difference]: Start difference. First operand 562 states and 1501 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:58,278 INFO L93 Difference]: Finished difference Result 697 states and 1781 transitions. [2022-02-10 03:07:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:07:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:58,280 INFO L225 Difference]: With dead ends: 697 [2022-02-10 03:07:58,280 INFO L226 Difference]: Without dead ends: 697 [2022-02-10 03:07:58,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:07:58,280 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:58,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 135 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:07:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-02-10 03:07:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 572. [2022-02-10 03:07:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.6970227670753064) internal successors, (1540), 571 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1540 transitions. [2022-02-10 03:07:58,287 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1540 transitions. Word has length 25 [2022-02-10 03:07:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:58,287 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1540 transitions. [2022-02-10 03:07:58,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1540 transitions. [2022-02-10 03:07:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:58,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:58,288 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:58,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-02-10 03:07:58,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-10 03:07:58,488 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash 289769415, now seen corresponding path program 206 times [2022-02-10 03:07:58,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:58,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220991263] [2022-02-10 03:07:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:58,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:58,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:58,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220991263] [2022-02-10 03:07:58,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220991263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:58,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442740413] [2022-02-10 03:07:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:07:58,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:58,594 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:58,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-10 03:07:58,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:07:58,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:58,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:07:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:58,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:58,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:07:58,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:58,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:07:58,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:58,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:07:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:58,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:07:59,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:59,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:07:59,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:59,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:07:59,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:07:59,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:07:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:59,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442740413] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:07:59,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:07:59,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:07:59,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629795293] [2022-02-10 03:07:59,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:07:59,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:07:59,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:07:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:07:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:07:59,213 INFO L87 Difference]: Start difference. First operand 572 states and 1540 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:07:59,373 INFO L93 Difference]: Finished difference Result 629 states and 1671 transitions. [2022-02-10 03:07:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:07:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:07:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:07:59,374 INFO L225 Difference]: With dead ends: 629 [2022-02-10 03:07:59,374 INFO L226 Difference]: Without dead ends: 629 [2022-02-10 03:07:59,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:07:59,374 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:07:59,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 114 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 337 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-02-10 03:07:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-02-10 03:07:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 578. [2022-02-10 03:07:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.703639514731369) internal successors, (1560), 577 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1560 transitions. [2022-02-10 03:07:59,381 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1560 transitions. Word has length 25 [2022-02-10 03:07:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:07:59,381 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1560 transitions. [2022-02-10 03:07:59,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:07:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1560 transitions. [2022-02-10 03:07:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:07:59,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:07:59,382 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:07:59,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-02-10 03:07:59,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-02-10 03:07:59,582 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:07:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:07:59,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1139438227, now seen corresponding path program 207 times [2022-02-10 03:07:59,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:07:59,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543146936] [2022-02-10 03:07:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:07:59,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:07:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:07:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:07:59,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:07:59,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543146936] [2022-02-10 03:07:59,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543146936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:07:59,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072187421] [2022-02-10 03:07:59,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:07:59,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:07:59,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:07:59,699 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:07:59,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-10 03:07:59,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:07:59,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:07:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:07:59,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:07:59,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:07:59,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:00,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:00,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:00,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:00,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:08:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:00,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:00,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:00,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:00,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:00,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:00,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:00,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:08:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:00,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072187421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:00,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:00,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:08:00,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311541737] [2022-02-10 03:08:00,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:00,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:00,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:00,367 INFO L87 Difference]: Start difference. First operand 578 states and 1560 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:00,491 INFO L93 Difference]: Finished difference Result 642 states and 1695 transitions. [2022-02-10 03:08:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:08:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:00,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:00,492 INFO L225 Difference]: With dead ends: 642 [2022-02-10 03:08:00,492 INFO L226 Difference]: Without dead ends: 642 [2022-02-10 03:08:00,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:00,493 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:00,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-02-10 03:08:00,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-10 03:08:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 586. [2022-02-10 03:08:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.717948717948718) internal successors, (1590), 585 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1590 transitions. [2022-02-10 03:08:00,507 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1590 transitions. Word has length 25 [2022-02-10 03:08:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:00,507 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1590 transitions. [2022-02-10 03:08:00,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1590 transitions. [2022-02-10 03:08:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:00,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:00,508 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:00,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-02-10 03:08:00,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-02-10 03:08:00,708 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:00,709 INFO L85 PathProgramCache]: Analyzing trace with hash -128147829, now seen corresponding path program 208 times [2022-02-10 03:08:00,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:00,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470942080] [2022-02-10 03:08:00,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:00,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:08:00,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:00,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470942080] [2022-02-10 03:08:00,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470942080] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:00,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806354074] [2022-02-10 03:08:00,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:00,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:00,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:00,817 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:00,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-10 03:08:00,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:00,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:00,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:00,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:01,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:01,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:01,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:01,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:08:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:08:01,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:01,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:01,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:01,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:01,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:08:01,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:01,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:08:01,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806354074] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:01,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:01,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:01,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606090711] [2022-02-10 03:08:01,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:01,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:01,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:01,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:01,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:01,428 INFO L87 Difference]: Start difference. First operand 586 states and 1590 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:01,591 INFO L93 Difference]: Finished difference Result 665 states and 1741 transitions. [2022-02-10 03:08:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:08:01,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:01,592 INFO L225 Difference]: With dead ends: 665 [2022-02-10 03:08:01,592 INFO L226 Difference]: Without dead ends: 665 [2022-02-10 03:08:01,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:08:01,593 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:01,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 124 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 355 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-02-10 03:08:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-02-10 03:08:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 576. [2022-02-10 03:08:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.699130434782609) internal successors, (1552), 575 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1552 transitions. [2022-02-10 03:08:01,599 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1552 transitions. Word has length 25 [2022-02-10 03:08:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:01,599 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1552 transitions. [2022-02-10 03:08:01,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1552 transitions. [2022-02-10 03:08:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:01,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:01,600 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:01,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-02-10 03:08:01,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:01,800 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:01,801 INFO L85 PathProgramCache]: Analyzing trace with hash 576259189, now seen corresponding path program 209 times [2022-02-10 03:08:01,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:01,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133933336] [2022-02-10 03:08:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:01,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:01,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:01,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133933336] [2022-02-10 03:08:01,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133933336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:01,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535982786] [2022-02-10 03:08:01,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:01,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:01,911 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:01,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-10 03:08:01,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:08:01,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:01,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:01,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:02,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:02,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:02,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:02,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:02,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:02,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:08:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:02,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:02,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:02,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:02,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:02,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:02,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:02,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:08:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:02,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535982786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:02,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:02,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:08:02,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917130273] [2022-02-10 03:08:02,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:02,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:02,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:02,468 INFO L87 Difference]: Start difference. First operand 576 states and 1552 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:02,586 INFO L93 Difference]: Finished difference Result 638 states and 1680 transitions. [2022-02-10 03:08:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:08:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:02,587 INFO L225 Difference]: With dead ends: 638 [2022-02-10 03:08:02,587 INFO L226 Difference]: Without dead ends: 638 [2022-02-10 03:08:02,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:02,587 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:02,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 87 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 238 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-02-10 03:08:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-10 03:08:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 579. [2022-02-10 03:08:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.7058823529411766) internal successors, (1564), 578 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1564 transitions. [2022-02-10 03:08:02,593 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1564 transitions. Word has length 25 [2022-02-10 03:08:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:02,593 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1564 transitions. [2022-02-10 03:08:02,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:02,594 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1564 transitions. [2022-02-10 03:08:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:02,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:02,594 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:02,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-02-10 03:08:02,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-02-10 03:08:02,795 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:02,795 INFO L85 PathProgramCache]: Analyzing trace with hash -177087597, now seen corresponding path program 210 times [2022-02-10 03:08:02,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:02,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731751008] [2022-02-10 03:08:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:02,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:02,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:02,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731751008] [2022-02-10 03:08:02,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731751008] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:02,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122246528] [2022-02-10 03:08:02,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:02,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:02,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:02,913 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:02,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-10 03:08:02,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:08:02,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:02,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:02,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:03,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:03,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:03,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:03,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:08:03,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:03,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:08:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:03,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:03,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:03,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:03,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:03,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:03,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:03,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:08:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:03,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122246528] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:03,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:03,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:08:03,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583827580] [2022-02-10 03:08:03,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:03,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:03,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:03,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:03,496 INFO L87 Difference]: Start difference. First operand 579 states and 1564 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:03,649 INFO L93 Difference]: Finished difference Result 632 states and 1667 transitions. [2022-02-10 03:08:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:08:03,650 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:03,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:03,651 INFO L225 Difference]: With dead ends: 632 [2022-02-10 03:08:03,651 INFO L226 Difference]: Without dead ends: 632 [2022-02-10 03:08:03,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:03,651 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:03,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 126 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 331 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-02-10 03:08:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-02-10 03:08:03,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 578. [2022-02-10 03:08:03,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.705372616984402) internal successors, (1561), 577 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1561 transitions. [2022-02-10 03:08:03,657 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1561 transitions. Word has length 25 [2022-02-10 03:08:03,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:03,657 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1561 transitions. [2022-02-10 03:08:03,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:03,657 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1561 transitions. [2022-02-10 03:08:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:03,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:03,658 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:03,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-02-10 03:08:03,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:03,858 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:03,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:03,858 INFO L85 PathProgramCache]: Analyzing trace with hash -587022441, now seen corresponding path program 211 times [2022-02-10 03:08:03,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:03,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232515993] [2022-02-10 03:08:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:03,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:04,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:04,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232515993] [2022-02-10 03:08:04,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232515993] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:04,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839878396] [2022-02-10 03:08:04,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:04,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:04,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:04,013 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:04,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-10 03:08:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:04,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:04,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:04,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:08:04,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:04,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:08:04,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:04,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:08:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:04,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:04,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:04,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:08:04,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:04,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:04,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:04,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:08:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:04,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839878396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:04,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:04,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:08:04,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026167826] [2022-02-10 03:08:04,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:04,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:04,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:04,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:04,421 INFO L87 Difference]: Start difference. First operand 578 states and 1561 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:04,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:04,616 INFO L93 Difference]: Finished difference Result 584 states and 1570 transitions. [2022-02-10 03:08:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:04,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:04,617 INFO L225 Difference]: With dead ends: 584 [2022-02-10 03:08:04,617 INFO L226 Difference]: Without dead ends: 582 [2022-02-10 03:08:04,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:08:04,617 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:04,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 250 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-02-10 03:08:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-02-10 03:08:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 581. [2022-02-10 03:08:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 2.696551724137931) internal successors, (1564), 580 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1564 transitions. [2022-02-10 03:08:04,623 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1564 transitions. Word has length 25 [2022-02-10 03:08:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:04,623 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 1564 transitions. [2022-02-10 03:08:04,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1564 transitions. [2022-02-10 03:08:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:04,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:04,624 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:04,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-02-10 03:08:04,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:04,824 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1525147163, now seen corresponding path program 212 times [2022-02-10 03:08:04,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:04,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662757111] [2022-02-10 03:08:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:04,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:04,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:04,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662757111] [2022-02-10 03:08:04,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662757111] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:04,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514259934] [2022-02-10 03:08:04,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:04,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:04,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:04,943 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:04,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-10 03:08:04,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:04,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:04,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:04,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:05,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:08:05,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:05,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:08:05,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:05,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:08:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:05,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:05,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:05,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:08:05,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:05,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2022-02-10 03:08:05,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:05,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-10 03:08:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:05,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514259934] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:05,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:05,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:08:05,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853726510] [2022-02-10 03:08:05,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:05,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:08:05,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:05,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:08:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:08:05,355 INFO L87 Difference]: Start difference. First operand 581 states and 1564 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:05,580 INFO L93 Difference]: Finished difference Result 602 states and 1591 transitions. [2022-02-10 03:08:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:08:05,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:05,581 INFO L225 Difference]: With dead ends: 602 [2022-02-10 03:08:05,581 INFO L226 Difference]: Without dead ends: 598 [2022-02-10 03:08:05,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:05,582 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:05,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 70 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 279 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-02-10 03:08:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-02-10 03:08:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 586. [2022-02-10 03:08:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.6837606837606836) internal successors, (1570), 585 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1570 transitions. [2022-02-10 03:08:05,588 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1570 transitions. Word has length 25 [2022-02-10 03:08:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:05,588 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1570 transitions. [2022-02-10 03:08:05,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1570 transitions. [2022-02-10 03:08:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:05,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:05,588 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:05,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-02-10 03:08:05,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-02-10 03:08:05,789 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash 335682951, now seen corresponding path program 213 times [2022-02-10 03:08:05,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:05,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420777802] [2022-02-10 03:08:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:05,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:05,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:05,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420777802] [2022-02-10 03:08:05,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420777802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:05,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273146347] [2022-02-10 03:08:05,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:05,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:05,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:05,889 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:05,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-10 03:08:05,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:08:05,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:05,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:05,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:05,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-02-10 03:08:06,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-02-10 03:08:06,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-10 03:08:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:06,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:06,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:06,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:08:06,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:06,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:06,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:06,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:08:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:06,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273146347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:06,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:06,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-10 03:08:06,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984498196] [2022-02-10 03:08:06,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:06,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:08:06,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:06,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:08:06,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:08:06,191 INFO L87 Difference]: Start difference. First operand 586 states and 1570 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:06,365 INFO L93 Difference]: Finished difference Result 590 states and 1573 transitions. [2022-02-10 03:08:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:06,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:06,366 INFO L225 Difference]: With dead ends: 590 [2022-02-10 03:08:06,366 INFO L226 Difference]: Without dead ends: 580 [2022-02-10 03:08:06,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:08:06,367 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:06,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:08:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-10 03:08:06,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 578. [2022-02-10 03:08:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.703639514731369) internal successors, (1560), 577 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1560 transitions. [2022-02-10 03:08:06,373 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1560 transitions. Word has length 25 [2022-02-10 03:08:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:06,373 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1560 transitions. [2022-02-10 03:08:06,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1560 transitions. [2022-02-10 03:08:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:06,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:06,374 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:06,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-02-10 03:08:06,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:06,574 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1535855639, now seen corresponding path program 214 times [2022-02-10 03:08:06,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:06,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962947108] [2022-02-10 03:08:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:06,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:06,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:06,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962947108] [2022-02-10 03:08:06,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962947108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:06,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034308100] [2022-02-10 03:08:06,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:06,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:06,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:06,708 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:06,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-10 03:08:06,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:06,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:06,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:06,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:06,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:06,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:06,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:06,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:06,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:08:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:06,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:07,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:07,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:07,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:07,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:08:07,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:07,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:07,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034308100] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:07,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:07,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:07,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185946279] [2022-02-10 03:08:07,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:07,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:07,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:07,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:07,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:07,204 INFO L87 Difference]: Start difference. First operand 578 states and 1560 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:07,424 INFO L93 Difference]: Finished difference Result 617 states and 1646 transitions. [2022-02-10 03:08:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:07,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:07,425 INFO L225 Difference]: With dead ends: 617 [2022-02-10 03:08:07,426 INFO L226 Difference]: Without dead ends: 617 [2022-02-10 03:08:07,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:08:07,426 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:07,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 121 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 392 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-02-10 03:08:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-10 03:08:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 577. [2022-02-10 03:08:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.7065972222222223) internal successors, (1559), 576 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1559 transitions. [2022-02-10 03:08:07,432 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1559 transitions. Word has length 25 [2022-02-10 03:08:07,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:07,432 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 1559 transitions. [2022-02-10 03:08:07,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1559 transitions. [2022-02-10 03:08:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:07,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:07,433 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:07,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-02-10 03:08:07,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:07,635 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:07,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1925031037, now seen corresponding path program 215 times [2022-02-10 03:08:07,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:07,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124535059] [2022-02-10 03:08:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:07,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:07,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:07,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124535059] [2022-02-10 03:08:07,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124535059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:07,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250401472] [2022-02-10 03:08:07,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:07,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:07,742 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:07,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-10 03:08:07,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:07,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:07,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:07,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:08:07,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:08:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:08,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:08,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:08,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:08,158 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:08,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:08,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250401472] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:08,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:08,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:08:08,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682636410] [2022-02-10 03:08:08,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:08,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:08,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:08,164 INFO L87 Difference]: Start difference. First operand 577 states and 1559 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:08,459 INFO L93 Difference]: Finished difference Result 653 states and 1742 transitions. [2022-02-10 03:08:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:08:08,459 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:08,460 INFO L225 Difference]: With dead ends: 653 [2022-02-10 03:08:08,460 INFO L226 Difference]: Without dead ends: 653 [2022-02-10 03:08:08,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:08:08,461 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:08,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 117 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-02-10 03:08:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 588. [2022-02-10 03:08:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.7137989778534926) internal successors, (1593), 587 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1593 transitions. [2022-02-10 03:08:08,467 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1593 transitions. Word has length 25 [2022-02-10 03:08:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:08,467 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1593 transitions. [2022-02-10 03:08:08,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:08,467 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1593 transitions. [2022-02-10 03:08:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:08,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:08,468 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:08,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-02-10 03:08:08,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-02-10 03:08:08,668 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2074674529, now seen corresponding path program 216 times [2022-02-10 03:08:08,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:08,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315564302] [2022-02-10 03:08:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:08,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:08,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:08,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315564302] [2022-02-10 03:08:08,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315564302] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:08,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533482947] [2022-02-10 03:08:08,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:08,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:08,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:08,777 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:08,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-10 03:08:08,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:08:08,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:08,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:08,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:08,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:08,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:09,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:09,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:08:09,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:08:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:09,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:09,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:09,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:09,303 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:09,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:09,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533482947] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:09,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:09,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:08:09,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105255906] [2022-02-10 03:08:09,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:09,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:09,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:09,310 INFO L87 Difference]: Start difference. First operand 588 states and 1593 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:09,524 INFO L93 Difference]: Finished difference Result 659 states and 1755 transitions. [2022-02-10 03:08:09,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:08:09,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:09,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:09,525 INFO L225 Difference]: With dead ends: 659 [2022-02-10 03:08:09,525 INFO L226 Difference]: Without dead ends: 659 [2022-02-10 03:08:09,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:08:09,525 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:09,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 135 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 165 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-02-10 03:08:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-10 03:08:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 588. [2022-02-10 03:08:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.7137989778534926) internal successors, (1593), 587 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1593 transitions. [2022-02-10 03:08:09,531 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1593 transitions. Word has length 25 [2022-02-10 03:08:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:09,531 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1593 transitions. [2022-02-10 03:08:09,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1593 transitions. [2022-02-10 03:08:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:09,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:09,532 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:09,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-02-10 03:08:09,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-02-10 03:08:09,733 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash -314523111, now seen corresponding path program 217 times [2022-02-10 03:08:09,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:09,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766883941] [2022-02-10 03:08:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:09,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:09,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:09,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766883941] [2022-02-10 03:08:09,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766883941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:09,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081783600] [2022-02-10 03:08:09,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:09,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:09,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:09,846 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:09,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-10 03:08:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:09,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:09,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:10,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:10,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:10,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:10,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:08:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:10,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:10,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:10,380 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:10,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:10,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081783600] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:10,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:10,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:10,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564328476] [2022-02-10 03:08:10,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:10,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:10,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:10,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:10,387 INFO L87 Difference]: Start difference. First operand 588 states and 1593 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:10,448 INFO L93 Difference]: Finished difference Result 634 states and 1720 transitions. [2022-02-10 03:08:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:08:10,448 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:10,449 INFO L225 Difference]: With dead ends: 634 [2022-02-10 03:08:10,449 INFO L226 Difference]: Without dead ends: 634 [2022-02-10 03:08:10,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:10,450 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:10,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 153 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2022-02-10 03:08:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-02-10 03:08:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 588. [2022-02-10 03:08:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.7137989778534926) internal successors, (1593), 587 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1593 transitions. [2022-02-10 03:08:10,455 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1593 transitions. Word has length 25 [2022-02-10 03:08:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:10,456 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1593 transitions. [2022-02-10 03:08:10,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1593 transitions. [2022-02-10 03:08:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:10,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:10,456 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:10,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-02-10 03:08:10,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-02-10 03:08:10,657 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1077994335, now seen corresponding path program 218 times [2022-02-10 03:08:10,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:10,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87271961] [2022-02-10 03:08:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:10,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:10,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:10,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87271961] [2022-02-10 03:08:10,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87271961] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:10,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053170654] [2022-02-10 03:08:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:10,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:10,749 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:10,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-10 03:08:10,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:10,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:10,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:10,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:10,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:11,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:11,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:11,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:11,175 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:11,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-02-10 03:08:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:11,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053170654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:11,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:11,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:08:11,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401808111] [2022-02-10 03:08:11,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:11,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:11,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:11,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:11,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:11,180 INFO L87 Difference]: Start difference. First operand 588 states and 1593 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:11,525 INFO L93 Difference]: Finished difference Result 666 states and 1777 transitions. [2022-02-10 03:08:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:08:11,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:11,526 INFO L225 Difference]: With dead ends: 666 [2022-02-10 03:08:11,527 INFO L226 Difference]: Without dead ends: 666 [2022-02-10 03:08:11,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:08:11,527 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:11,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 150 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-02-10 03:08:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 582. [2022-02-10 03:08:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.710843373493976) internal successors, (1575), 581 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:11,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1575 transitions. [2022-02-10 03:08:11,533 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1575 transitions. Word has length 25 [2022-02-10 03:08:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:11,533 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 1575 transitions. [2022-02-10 03:08:11,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1575 transitions. [2022-02-10 03:08:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:11,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:11,534 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:11,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-02-10 03:08:11,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:11,734 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:11,735 INFO L85 PathProgramCache]: Analyzing trace with hash -831559195, now seen corresponding path program 219 times [2022-02-10 03:08:11,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:11,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949287789] [2022-02-10 03:08:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:11,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:11,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:11,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949287789] [2022-02-10 03:08:11,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949287789] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:11,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258170060] [2022-02-10 03:08:11,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:11,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:11,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:11,840 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:11,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-10 03:08:11,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:08:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:11,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:12,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:12,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:12,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:12,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:12,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:12,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:12,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:12,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:12,336 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:12,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:12,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258170060] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:12,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:12,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:08:12,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904909522] [2022-02-10 03:08:12,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:12,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:12,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:12,343 INFO L87 Difference]: Start difference. First operand 582 states and 1575 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:12,509 INFO L93 Difference]: Finished difference Result 663 states and 1753 transitions. [2022-02-10 03:08:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:08:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:12,510 INFO L225 Difference]: With dead ends: 663 [2022-02-10 03:08:12,510 INFO L226 Difference]: Without dead ends: 647 [2022-02-10 03:08:12,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:12,510 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:12,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 116 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 241 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-02-10 03:08:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-02-10 03:08:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 581. [2022-02-10 03:08:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 2.7103448275862068) internal successors, (1572), 580 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1572 transitions. [2022-02-10 03:08:12,516 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1572 transitions. Word has length 25 [2022-02-10 03:08:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:12,516 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 1572 transitions. [2022-02-10 03:08:12,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1572 transitions. [2022-02-10 03:08:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:12,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:12,517 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:12,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:12,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-02-10 03:08:12,718 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2063258375, now seen corresponding path program 220 times [2022-02-10 03:08:12,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:12,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16495783] [2022-02-10 03:08:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:12,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:12,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:12,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16495783] [2022-02-10 03:08:12,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16495783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:12,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865094262] [2022-02-10 03:08:12,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:12,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:12,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:12,836 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:12,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-10 03:08:12,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:12,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:12,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:12,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:12,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:13,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:13,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:13,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:13,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:13,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:13,342 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:13,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:13,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865094262] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:13,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:13,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:08:13,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867014556] [2022-02-10 03:08:13,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:13,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:08:13,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:13,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:08:13,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:08:13,348 INFO L87 Difference]: Start difference. First operand 581 states and 1572 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:13,867 INFO L93 Difference]: Finished difference Result 725 states and 1859 transitions. [2022-02-10 03:08:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:08:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:13,869 INFO L225 Difference]: With dead ends: 725 [2022-02-10 03:08:13,869 INFO L226 Difference]: Without dead ends: 725 [2022-02-10 03:08:13,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:08:13,869 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:13,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 133 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-02-10 03:08:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 605. [2022-02-10 03:08:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.7533112582781456) internal successors, (1663), 604 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1663 transitions. [2022-02-10 03:08:13,876 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1663 transitions. Word has length 25 [2022-02-10 03:08:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:13,876 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1663 transitions. [2022-02-10 03:08:13,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1663 transitions. [2022-02-10 03:08:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:13,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:13,877 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:13,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-02-10 03:08:14,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:14,078 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:14,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:14,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1767996645, now seen corresponding path program 221 times [2022-02-10 03:08:14,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:14,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441677835] [2022-02-10 03:08:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:14,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:14,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:14,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441677835] [2022-02-10 03:08:14,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441677835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:14,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031528178] [2022-02-10 03:08:14,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:14,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:14,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:14,188 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:14,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-10 03:08:14,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:14,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:14,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:14,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:14,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:14,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:14,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:14,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:14,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:14,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:14,744 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:14,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:14,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031528178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:14,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:14,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:14,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867958638] [2022-02-10 03:08:14,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:14,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:14,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:14,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:14,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:14,751 INFO L87 Difference]: Start difference. First operand 605 states and 1663 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:14,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:14,943 INFO L93 Difference]: Finished difference Result 681 states and 1849 transitions. [2022-02-10 03:08:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:08:14,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:14,944 INFO L225 Difference]: With dead ends: 681 [2022-02-10 03:08:14,944 INFO L226 Difference]: Without dead ends: 681 [2022-02-10 03:08:14,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:08:14,944 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:14,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 118 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 293 Invalid, 0 Unknown, 114 Unchecked, 0.1s Time] [2022-02-10 03:08:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-02-10 03:08:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 605. [2022-02-10 03:08:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.7533112582781456) internal successors, (1663), 604 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1663 transitions. [2022-02-10 03:08:14,951 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1663 transitions. Word has length 25 [2022-02-10 03:08:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:14,951 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1663 transitions. [2022-02-10 03:08:14,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1663 transitions. [2022-02-10 03:08:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:14,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:14,952 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:14,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-02-10 03:08:15,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-02-10 03:08:15,152 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:15,152 INFO L85 PathProgramCache]: Analyzing trace with hash -621200995, now seen corresponding path program 222 times [2022-02-10 03:08:15,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:15,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862110658] [2022-02-10 03:08:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:15,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:15,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:15,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862110658] [2022-02-10 03:08:15,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862110658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:15,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751678500] [2022-02-10 03:08:15,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:15,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:15,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:15,277 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:15,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-10 03:08:15,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:08:15,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:15,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:15,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:15,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:15,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:15,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:08:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:15,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:15,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:15,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:15,831 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:15,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:15,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751678500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:15,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:15,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:15,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089352714] [2022-02-10 03:08:15,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:15,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:15,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:15,838 INFO L87 Difference]: Start difference. First operand 605 states and 1663 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:15,934 INFO L93 Difference]: Finished difference Result 679 states and 1845 transitions. [2022-02-10 03:08:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:15,934 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:15,935 INFO L225 Difference]: With dead ends: 679 [2022-02-10 03:08:15,935 INFO L226 Difference]: Without dead ends: 679 [2022-02-10 03:08:15,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:15,936 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:15,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 152 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 257 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2022-02-10 03:08:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-02-10 03:08:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 609. [2022-02-10 03:08:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 2.763157894736842) internal successors, (1680), 608 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1680 transitions. [2022-02-10 03:08:15,942 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1680 transitions. Word has length 25 [2022-02-10 03:08:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:15,942 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1680 transitions. [2022-02-10 03:08:15,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1680 transitions. [2022-02-10 03:08:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:15,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:15,943 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:15,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-02-10 03:08:16,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2022-02-10 03:08:16,143 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash -700237535, now seen corresponding path program 223 times [2022-02-10 03:08:16,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:16,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871700046] [2022-02-10 03:08:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:16,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:16,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:16,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871700046] [2022-02-10 03:08:16,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871700046] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:16,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218409154] [2022-02-10 03:08:16,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:16,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:16,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:16,291 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:16,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-10 03:08:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:16,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:16,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:16,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:16,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:16,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:08:16,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:08:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:16,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:16,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:16,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-10 03:08:16,893 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:16,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:16,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218409154] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:16,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:16,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:08:16,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144811990] [2022-02-10 03:08:16,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:16,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:16,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:16,899 INFO L87 Difference]: Start difference. First operand 609 states and 1680 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:16,996 INFO L93 Difference]: Finished difference Result 648 states and 1762 transitions. [2022-02-10 03:08:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:16,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:16,997 INFO L225 Difference]: With dead ends: 648 [2022-02-10 03:08:16,997 INFO L226 Difference]: Without dead ends: 634 [2022-02-10 03:08:16,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:16,997 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:16,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 95 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2022-02-10 03:08:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-02-10 03:08:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 611. [2022-02-10 03:08:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.7524590163934426) internal successors, (1679), 610 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1679 transitions. [2022-02-10 03:08:17,006 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1679 transitions. Word has length 25 [2022-02-10 03:08:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:17,006 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1679 transitions. [2022-02-10 03:08:17,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1679 transitions. [2022-02-10 03:08:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:17,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:17,007 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:17,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:17,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:17,227 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:17,228 INFO L85 PathProgramCache]: Analyzing trace with hash -976765791, now seen corresponding path program 224 times [2022-02-10 03:08:17,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:17,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672926538] [2022-02-10 03:08:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:17,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:17,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:17,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672926538] [2022-02-10 03:08:17,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672926538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:17,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850436737] [2022-02-10 03:08:17,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:17,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:17,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:17,340 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:17,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-10 03:08:17,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:17,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:17,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:17,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:17,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:17,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:17,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:17,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:17,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:17,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:17,998 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:17,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:18,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850436737] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:18,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:18,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:18,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800308295] [2022-02-10 03:08:18,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:18,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:18,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:18,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:18,005 INFO L87 Difference]: Start difference. First operand 611 states and 1679 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:18,097 INFO L93 Difference]: Finished difference Result 682 states and 1858 transitions. [2022-02-10 03:08:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:18,098 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:18,099 INFO L225 Difference]: With dead ends: 682 [2022-02-10 03:08:18,099 INFO L226 Difference]: Without dead ends: 682 [2022-02-10 03:08:18,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:18,099 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:18,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 123 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-02-10 03:08:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-10 03:08:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 605. [2022-02-10 03:08:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.7533112582781456) internal successors, (1663), 604 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:18,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1663 transitions. [2022-02-10 03:08:18,107 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1663 transitions. Word has length 25 [2022-02-10 03:08:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:18,108 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1663 transitions. [2022-02-10 03:08:18,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1663 transitions. [2022-02-10 03:08:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:18,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:18,109 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:18,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-02-10 03:08:18,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:18,315 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:18,316 INFO L85 PathProgramCache]: Analyzing trace with hash -145014239, now seen corresponding path program 225 times [2022-02-10 03:08:18,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:18,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132811788] [2022-02-10 03:08:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:18,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:18,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:18,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132811788] [2022-02-10 03:08:18,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132811788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:18,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688615793] [2022-02-10 03:08:18,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:18,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:18,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:18,454 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:18,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-10 03:08:18,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:18,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:18,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:18,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:18,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:18,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:18,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:18,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:08:18,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:08:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:18,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:18,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:18,975 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:18,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:18,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688615793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:18,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:18,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:08:18,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919807118] [2022-02-10 03:08:18,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:18,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:18,982 INFO L87 Difference]: Start difference. First operand 605 states and 1663 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:19,117 INFO L93 Difference]: Finished difference Result 649 states and 1754 transitions. [2022-02-10 03:08:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:19,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:19,119 INFO L225 Difference]: With dead ends: 649 [2022-02-10 03:08:19,119 INFO L226 Difference]: Without dead ends: 645 [2022-02-10 03:08:19,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:19,119 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:19,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 98 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 158 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-02-10 03:08:19,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-02-10 03:08:19,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 612. [2022-02-10 03:08:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.734860883797054) internal successors, (1671), 611 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1671 transitions. [2022-02-10 03:08:19,125 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1671 transitions. Word has length 25 [2022-02-10 03:08:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:19,125 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1671 transitions. [2022-02-10 03:08:19,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1671 transitions. [2022-02-10 03:08:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:19,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:19,126 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:19,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-02-10 03:08:19,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-02-10 03:08:19,327 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1715815875, now seen corresponding path program 226 times [2022-02-10 03:08:19,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:19,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942216389] [2022-02-10 03:08:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:19,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:19,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:19,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942216389] [2022-02-10 03:08:19,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942216389] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:19,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400126208] [2022-02-10 03:08:19,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:19,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:19,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:19,441 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:19,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-10 03:08:19,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:19,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:19,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:19,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:19,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:19,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:19,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:08:19,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:08:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:19,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:19,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:19,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-10 03:08:19,895 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:19,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:19,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400126208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:19,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:19,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:08:19,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258959513] [2022-02-10 03:08:19,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:19,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:19,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:19,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:19,902 INFO L87 Difference]: Start difference. First operand 612 states and 1671 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:19,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:19,991 INFO L93 Difference]: Finished difference Result 633 states and 1726 transitions. [2022-02-10 03:08:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:19,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:19,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:19,992 INFO L225 Difference]: With dead ends: 633 [2022-02-10 03:08:19,992 INFO L226 Difference]: Without dead ends: 624 [2022-02-10 03:08:19,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:19,992 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:19,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 108 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2022-02-10 03:08:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-02-10 03:08:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 605. [2022-02-10 03:08:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.751655629139073) internal successors, (1662), 604 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1662 transitions. [2022-02-10 03:08:19,999 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1662 transitions. Word has length 25 [2022-02-10 03:08:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:19,999 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1662 transitions. [2022-02-10 03:08:19,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1662 transitions. [2022-02-10 03:08:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:19,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:19,999 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:20,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-02-10 03:08:20,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-02-10 03:08:20,200 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1539944829, now seen corresponding path program 227 times [2022-02-10 03:08:20,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:20,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106097169] [2022-02-10 03:08:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:20,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:20,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:20,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106097169] [2022-02-10 03:08:20,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106097169] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:20,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898204392] [2022-02-10 03:08:20,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:20,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:20,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:20,311 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:20,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-10 03:08:20,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:20,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:20,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:20,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:20,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:20,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:20,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:20,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:08:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:20,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:20,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:20,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:20,918 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:20,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:20,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898204392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:20,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:20,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:08:20,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933052767] [2022-02-10 03:08:20,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:20,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:08:20,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:20,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:08:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:08:20,925 INFO L87 Difference]: Start difference. First operand 605 states and 1662 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:21,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:21,026 INFO L93 Difference]: Finished difference Result 733 states and 1985 transitions. [2022-02-10 03:08:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:08:21,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:21,028 INFO L225 Difference]: With dead ends: 733 [2022-02-10 03:08:21,028 INFO L226 Difference]: Without dead ends: 733 [2022-02-10 03:08:21,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:08:21,028 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:21,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 136 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 275 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-02-10 03:08:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-02-10 03:08:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 612. [2022-02-10 03:08:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.76759410801964) internal successors, (1691), 611 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1691 transitions. [2022-02-10 03:08:21,035 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1691 transitions. Word has length 25 [2022-02-10 03:08:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:21,035 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1691 transitions. [2022-02-10 03:08:21,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1691 transitions. [2022-02-10 03:08:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:21,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:21,036 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:21,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-02-10 03:08:21,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-02-10 03:08:21,236 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2001675681, now seen corresponding path program 228 times [2022-02-10 03:08:21,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:21,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012147816] [2022-02-10 03:08:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:21,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:21,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:21,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012147816] [2022-02-10 03:08:21,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012147816] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:21,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669918322] [2022-02-10 03:08:21,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:21,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:21,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:21,355 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:21,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-10 03:08:21,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:08:21,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:21,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:21,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:21,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:21,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:21,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:08:21,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:08:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:21,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:21,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:21,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:21,946 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:21,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:21,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669918322] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:21,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:21,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:21,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162375045] [2022-02-10 03:08:21,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:21,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:21,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:21,953 INFO L87 Difference]: Start difference. First operand 612 states and 1691 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:22,070 INFO L93 Difference]: Finished difference Result 672 states and 1839 transitions. [2022-02-10 03:08:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:22,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:22,072 INFO L225 Difference]: With dead ends: 672 [2022-02-10 03:08:22,072 INFO L226 Difference]: Without dead ends: 672 [2022-02-10 03:08:22,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:08:22,072 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:22,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 143 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 209 Unchecked, 0.1s Time] [2022-02-10 03:08:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-02-10 03:08:22,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 609. [2022-02-10 03:08:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 2.763157894736842) internal successors, (1680), 608 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1680 transitions. [2022-02-10 03:08:22,078 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1680 transitions. Word has length 25 [2022-02-10 03:08:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:22,078 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1680 transitions. [2022-02-10 03:08:22,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1680 transitions. [2022-02-10 03:08:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:22,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:22,079 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:22,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-02-10 03:08:22,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:22,280 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash -966560305, now seen corresponding path program 229 times [2022-02-10 03:08:22,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:22,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739771921] [2022-02-10 03:08:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:22,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:22,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:22,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739771921] [2022-02-10 03:08:22,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739771921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:22,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868535795] [2022-02-10 03:08:22,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:22,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:22,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:22,396 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:22,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-10 03:08:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:22,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:22,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:08:22,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:08:22,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:08:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:22,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:22,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:22,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:22,801 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:22,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:22,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868535795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:22,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:22,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:08:22,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488731786] [2022-02-10 03:08:22,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:22,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:22,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:22,808 INFO L87 Difference]: Start difference. First operand 609 states and 1680 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:23,115 INFO L93 Difference]: Finished difference Result 897 states and 2367 transitions. [2022-02-10 03:08:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:08:23,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:23,117 INFO L225 Difference]: With dead ends: 897 [2022-02-10 03:08:23,117 INFO L226 Difference]: Without dead ends: 897 [2022-02-10 03:08:23,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:08:23,118 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:23,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 151 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 437 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-02-10 03:08:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-02-10 03:08:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 601. [2022-02-10 03:08:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.743333333333333) internal successors, (1646), 600 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1646 transitions. [2022-02-10 03:08:23,125 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1646 transitions. Word has length 25 [2022-02-10 03:08:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:23,125 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1646 transitions. [2022-02-10 03:08:23,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1646 transitions. [2022-02-10 03:08:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:23,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:23,126 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:23,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-02-10 03:08:23,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-02-10 03:08:23,326 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:23,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1045596845, now seen corresponding path program 230 times [2022-02-10 03:08:23,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:23,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997221834] [2022-02-10 03:08:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:23,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:23,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:23,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997221834] [2022-02-10 03:08:23,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997221834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:23,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943839073] [2022-02-10 03:08:23,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:23,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:23,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:23,453 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:23,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-10 03:08:23,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:23,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:23,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:08:23,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-10 03:08:23,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-02-10 03:08:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:23,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:23,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:23,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:23,901 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:23,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:23,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943839073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:23,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:23,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:08:23,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723309616] [2022-02-10 03:08:23,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:23,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:08:23,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:23,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:08:23,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:08:23,908 INFO L87 Difference]: Start difference. First operand 601 states and 1646 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:24,196 INFO L93 Difference]: Finished difference Result 787 states and 2119 transitions. [2022-02-10 03:08:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:24,197 INFO L225 Difference]: With dead ends: 787 [2022-02-10 03:08:24,197 INFO L226 Difference]: Without dead ends: 773 [2022-02-10 03:08:24,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:24,198 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:24,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 146 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 437 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-02-10 03:08:24,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-02-10 03:08:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 607. [2022-02-10 03:08:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.742574257425743) internal successors, (1662), 606 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1662 transitions. [2022-02-10 03:08:24,204 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1662 transitions. Word has length 25 [2022-02-10 03:08:24,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:24,204 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1662 transitions. [2022-02-10 03:08:24,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1662 transitions. [2022-02-10 03:08:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:24,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:24,205 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:24,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-02-10 03:08:24,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-02-10 03:08:24,406 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1322125101, now seen corresponding path program 231 times [2022-02-10 03:08:24,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:24,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293837023] [2022-02-10 03:08:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:24,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:24,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:24,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293837023] [2022-02-10 03:08:24,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293837023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:24,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770811940] [2022-02-10 03:08:24,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:24,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:24,496 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:24,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-10 03:08:24,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:24,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:24,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:24,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:08:24,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:08:24,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:08:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:24,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:24,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:24,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:24,875 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:24,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:24,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770811940] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:24,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:24,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:08:24,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495024849] [2022-02-10 03:08:24,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:24,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:08:24,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:08:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:08:24,881 INFO L87 Difference]: Start difference. First operand 607 states and 1662 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:25,082 INFO L93 Difference]: Finished difference Result 655 states and 1758 transitions. [2022-02-10 03:08:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:25,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:25,084 INFO L225 Difference]: With dead ends: 655 [2022-02-10 03:08:25,084 INFO L226 Difference]: Without dead ends: 655 [2022-02-10 03:08:25,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:25,084 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:25,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 116 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-02-10 03:08:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 601. [2022-02-10 03:08:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.743333333333333) internal successors, (1646), 600 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1646 transitions. [2022-02-10 03:08:25,090 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1646 transitions. Word has length 25 [2022-02-10 03:08:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:25,090 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1646 transitions. [2022-02-10 03:08:25,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1646 transitions. [2022-02-10 03:08:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:25,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:25,091 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:25,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-02-10 03:08:25,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-02-10 03:08:25,292 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash 536994699, now seen corresponding path program 232 times [2022-02-10 03:08:25,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:25,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284804895] [2022-02-10 03:08:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:25,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:25,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:25,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284804895] [2022-02-10 03:08:25,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284804895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:25,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633863448] [2022-02-10 03:08:25,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:25,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:25,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:25,361 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:25,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-10 03:08:25,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:25,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:25,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:25,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:25,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:08:25,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:08:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:25,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:25,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:25,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:25,616 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:25,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-02-10 03:08:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:25,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633863448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:25,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:25,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:08:25,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612654361] [2022-02-10 03:08:25,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:25,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:08:25,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:25,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:08:25,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:08:25,621 INFO L87 Difference]: Start difference. First operand 601 states and 1646 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:25,816 INFO L93 Difference]: Finished difference Result 639 states and 1743 transitions. [2022-02-10 03:08:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:25,817 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:25,818 INFO L225 Difference]: With dead ends: 639 [2022-02-10 03:08:25,818 INFO L226 Difference]: Without dead ends: 639 [2022-02-10 03:08:25,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:25,818 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:25,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 119 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:25,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-10 03:08:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 603. [2022-02-10 03:08:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.7392026578073088) internal successors, (1649), 602 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1649 transitions. [2022-02-10 03:08:25,824 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1649 transitions. Word has length 25 [2022-02-10 03:08:25,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:25,824 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 1649 transitions. [2022-02-10 03:08:25,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1649 transitions. [2022-02-10 03:08:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:25,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:25,825 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:25,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-02-10 03:08:26,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:26,025 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:26,026 INFO L85 PathProgramCache]: Analyzing trace with hash 944901127, now seen corresponding path program 233 times [2022-02-10 03:08:26,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:26,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123374000] [2022-02-10 03:08:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:26,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:26,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:26,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123374000] [2022-02-10 03:08:26,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123374000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:26,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519637235] [2022-02-10 03:08:26,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:26,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:26,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:26,104 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:26,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-10 03:08:26,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:26,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:26,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:26,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:08:26,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:26,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:08:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:26,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:26,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:26,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:26,372 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:26,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-02-10 03:08:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:26,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519637235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:26,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:26,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:08:26,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578798482] [2022-02-10 03:08:26,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:26,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:08:26,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:26,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:08:26,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:08:26,378 INFO L87 Difference]: Start difference. First operand 603 states and 1649 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:26,617 INFO L93 Difference]: Finished difference Result 670 states and 1793 transitions. [2022-02-10 03:08:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:08:26,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:26,618 INFO L225 Difference]: With dead ends: 670 [2022-02-10 03:08:26,618 INFO L226 Difference]: Without dead ends: 658 [2022-02-10 03:08:26,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:26,619 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:26,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 136 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-02-10 03:08:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 615. [2022-02-10 03:08:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.737785016286645) internal successors, (1681), 614 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1681 transitions. [2022-02-10 03:08:26,625 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1681 transitions. Word has length 25 [2022-02-10 03:08:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:26,625 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1681 transitions. [2022-02-10 03:08:26,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1681 transitions. [2022-02-10 03:08:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:26,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:26,626 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:26,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-02-10 03:08:26,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:26,826 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash 865635275, now seen corresponding path program 234 times [2022-02-10 03:08:26,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:26,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342786962] [2022-02-10 03:08:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:26,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:26,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:26,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342786962] [2022-02-10 03:08:26,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342786962] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:26,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513155162] [2022-02-10 03:08:26,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:26,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:26,915 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:26,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-10 03:08:26,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:08:26,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:26,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:26,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:27,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:08:27,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:08:27,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:08:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:27,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:27,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:27,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:08:27,263 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:27,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:27,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513155162] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:27,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:27,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:08:27,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560958750] [2022-02-10 03:08:27,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:27,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:08:27,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:27,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:08:27,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:08:27,269 INFO L87 Difference]: Start difference. First operand 615 states and 1681 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:27,615 INFO L93 Difference]: Finished difference Result 891 states and 2296 transitions. [2022-02-10 03:08:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:08:27,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:27,616 INFO L225 Difference]: With dead ends: 891 [2022-02-10 03:08:27,616 INFO L226 Difference]: Without dead ends: 891 [2022-02-10 03:08:27,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:08:27,617 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 157 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:27,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 129 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-02-10 03:08:27,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 631. [2022-02-10 03:08:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.7412698412698413) internal successors, (1727), 630 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1727 transitions. [2022-02-10 03:08:27,624 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1727 transitions. Word has length 25 [2022-02-10 03:08:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:27,624 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1727 transitions. [2022-02-10 03:08:27,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1727 transitions. [2022-02-10 03:08:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:27,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:27,625 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:27,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-02-10 03:08:27,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:27,825 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1667372875, now seen corresponding path program 235 times [2022-02-10 03:08:27,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:27,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893608387] [2022-02-10 03:08:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:27,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:27,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:27,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893608387] [2022-02-10 03:08:27,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893608387] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:27,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390927351] [2022-02-10 03:08:27,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:27,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:27,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:27,919 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:27,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-10 03:08:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:27,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:27,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:28,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:08:28,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-10 03:08:28,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-02-10 03:08:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:28,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:28,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:28,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-02-10 03:08:28,236 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:28,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:28,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390927351] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:28,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:28,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:08:28,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822208390] [2022-02-10 03:08:28,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:28,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:08:28,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:28,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:08:28,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:08:28,242 INFO L87 Difference]: Start difference. First operand 631 states and 1727 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:28,504 INFO L93 Difference]: Finished difference Result 747 states and 1976 transitions. [2022-02-10 03:08:28,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:28,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:28,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:28,506 INFO L225 Difference]: With dead ends: 747 [2022-02-10 03:08:28,506 INFO L226 Difference]: Without dead ends: 729 [2022-02-10 03:08:28,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:28,506 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 92 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:28,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 93 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:08:28,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-02-10 03:08:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 631. [2022-02-10 03:08:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.7333333333333334) internal successors, (1722), 630 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1722 transitions. [2022-02-10 03:08:28,513 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1722 transitions. Word has length 25 [2022-02-10 03:08:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:28,513 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1722 transitions. [2022-02-10 03:08:28,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1722 transitions. [2022-02-10 03:08:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:28,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:28,514 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:28,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-02-10 03:08:28,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:28,715 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:28,715 INFO L85 PathProgramCache]: Analyzing trace with hash 611846151, now seen corresponding path program 236 times [2022-02-10 03:08:28,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:28,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953291612] [2022-02-10 03:08:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:28,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:28,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:28,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953291612] [2022-02-10 03:08:28,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953291612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:28,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397643239] [2022-02-10 03:08:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:28,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:28,799 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:28,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-10 03:08:28,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:28,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:28,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:28,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:28,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:08:28,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:08:28,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:08:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:28,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:29,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:29,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:08:29,108 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:29,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:29,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397643239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:29,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:29,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-10 03:08:29,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632548447] [2022-02-10 03:08:29,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:29,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:08:29,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:08:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:08:29,117 INFO L87 Difference]: Start difference. First operand 631 states and 1722 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:29,372 INFO L93 Difference]: Finished difference Result 860 states and 2245 transitions. [2022-02-10 03:08:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:29,373 INFO L225 Difference]: With dead ends: 860 [2022-02-10 03:08:29,373 INFO L226 Difference]: Without dead ends: 860 [2022-02-10 03:08:29,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:29,374 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:29,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 162 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-02-10 03:08:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 631. [2022-02-10 03:08:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.7333333333333334) internal successors, (1722), 630 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1722 transitions. [2022-02-10 03:08:29,381 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1722 transitions. Word has length 25 [2022-02-10 03:08:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:29,381 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1722 transitions. [2022-02-10 03:08:29,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1722 transitions. [2022-02-10 03:08:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:29,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:29,382 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:29,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-02-10 03:08:29,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-02-10 03:08:29,582 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1477738733, now seen corresponding path program 237 times [2022-02-10 03:08:29,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:29,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668441969] [2022-02-10 03:08:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:29,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:08:29,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:29,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668441969] [2022-02-10 03:08:29,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668441969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:29,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113023862] [2022-02-10 03:08:29,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:29,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:29,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:29,678 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:29,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-10 03:08:29,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:08:29,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:29,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:29,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:29,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:08:29,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:08:29,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:08:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:08:29,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:29,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:29,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:30,051 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:30,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:08:30,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113023862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:30,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:30,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:08:30,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641198832] [2022-02-10 03:08:30,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:30,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:30,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:30,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:30,058 INFO L87 Difference]: Start difference. First operand 631 states and 1722 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:30,324 INFO L93 Difference]: Finished difference Result 868 states and 2337 transitions. [2022-02-10 03:08:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:08:30,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:30,326 INFO L225 Difference]: With dead ends: 868 [2022-02-10 03:08:30,326 INFO L226 Difference]: Without dead ends: 868 [2022-02-10 03:08:30,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:08:30,326 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:30,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 173 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 468 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-02-10 03:08:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-02-10 03:08:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 619. [2022-02-10 03:08:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.73462783171521) internal successors, (1690), 618 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1690 transitions. [2022-02-10 03:08:30,333 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1690 transitions. Word has length 25 [2022-02-10 03:08:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:30,333 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1690 transitions. [2022-02-10 03:08:30,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1690 transitions. [2022-02-10 03:08:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:30,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:30,334 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:30,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-02-10 03:08:30,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:30,535 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash 627345675, now seen corresponding path program 238 times [2022-02-10 03:08:30,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:30,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215368788] [2022-02-10 03:08:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:30,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:30,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:30,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215368788] [2022-02-10 03:08:30,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215368788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:30,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317881309] [2022-02-10 03:08:30,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:30,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:30,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:30,633 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:30,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-10 03:08:30,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:30,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:30,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:30,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:30,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:08:30,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:08:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:30,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:31,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:31,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:31,063 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:31,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-02-10 03:08:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:31,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317881309] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:31,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:31,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:31,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193860487] [2022-02-10 03:08:31,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:31,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:31,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:31,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:31,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:31,069 INFO L87 Difference]: Start difference. First operand 619 states and 1690 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:31,439 INFO L93 Difference]: Finished difference Result 684 states and 1862 transitions. [2022-02-10 03:08:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:08:31,439 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:31,440 INFO L225 Difference]: With dead ends: 684 [2022-02-10 03:08:31,440 INFO L226 Difference]: Without dead ends: 684 [2022-02-10 03:08:31,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:08:31,440 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:31,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 146 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:31,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-10 03:08:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 625. [2022-02-10 03:08:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.735576923076923) internal successors, (1707), 624 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1707 transitions. [2022-02-10 03:08:31,447 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1707 transitions. Word has length 25 [2022-02-10 03:08:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:31,447 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1707 transitions. [2022-02-10 03:08:31,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1707 transitions. [2022-02-10 03:08:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:31,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:31,448 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:31,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:31,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-02-10 03:08:31,649 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash 332083945, now seen corresponding path program 239 times [2022-02-10 03:08:31,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:31,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19386714] [2022-02-10 03:08:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:31,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:31,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:31,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19386714] [2022-02-10 03:08:31,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19386714] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:31,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147483043] [2022-02-10 03:08:31,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:31,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:31,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:31,783 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:31,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-10 03:08:31,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:31,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:31,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:31,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:31,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:32,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:32,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:32,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:32,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:32,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:32,352 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:32,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:32,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147483043] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:32,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:32,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:08:32,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466607526] [2022-02-10 03:08:32,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:32,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:08:32,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:08:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:08:32,359 INFO L87 Difference]: Start difference. First operand 625 states and 1707 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:32,631 INFO L93 Difference]: Finished difference Result 692 states and 1854 transitions. [2022-02-10 03:08:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:08:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:32,633 INFO L225 Difference]: With dead ends: 692 [2022-02-10 03:08:32,633 INFO L226 Difference]: Without dead ends: 692 [2022-02-10 03:08:32,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:08:32,633 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:32,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 128 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 325 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2022-02-10 03:08:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-02-10 03:08:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 625. [2022-02-10 03:08:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.735576923076923) internal successors, (1707), 624 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1707 transitions. [2022-02-10 03:08:32,639 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1707 transitions. Word has length 25 [2022-02-10 03:08:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:32,639 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1707 transitions. [2022-02-10 03:08:32,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1707 transitions. [2022-02-10 03:08:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:32,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:32,640 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:32,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-02-10 03:08:32,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-02-10 03:08:32,841 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2057113695, now seen corresponding path program 240 times [2022-02-10 03:08:32,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:32,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98888281] [2022-02-10 03:08:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:32,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:32,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:32,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98888281] [2022-02-10 03:08:32,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98888281] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:32,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654531757] [2022-02-10 03:08:32,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:32,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:32,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:32,971 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:32,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-10 03:08:32,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:08:32,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:33,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:33,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:33,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:33,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:33,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:33,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:33,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:33,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:33,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:33,529 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:33,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:33,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654531757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:33,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:33,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:33,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85209129] [2022-02-10 03:08:33,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:33,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:33,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:33,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:33,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:33,536 INFO L87 Difference]: Start difference. First operand 625 states and 1707 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:33,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:33,598 INFO L93 Difference]: Finished difference Result 665 states and 1825 transitions. [2022-02-10 03:08:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:08:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:33,599 INFO L225 Difference]: With dead ends: 665 [2022-02-10 03:08:33,599 INFO L226 Difference]: Without dead ends: 665 [2022-02-10 03:08:33,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:33,600 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:33,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-02-10 03:08:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-02-10 03:08:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 625. [2022-02-10 03:08:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.735576923076923) internal successors, (1707), 624 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1707 transitions. [2022-02-10 03:08:33,606 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1707 transitions. Word has length 25 [2022-02-10 03:08:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:33,606 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1707 transitions. [2022-02-10 03:08:33,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1707 transitions. [2022-02-10 03:08:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:33,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:33,607 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:33,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-02-10 03:08:33,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:33,807 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:33,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1474382377, now seen corresponding path program 241 times [2022-02-10 03:08:33,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:33,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186558346] [2022-02-10 03:08:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:33,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:33,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:33,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186558346] [2022-02-10 03:08:33,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186558346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:33,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975532311] [2022-02-10 03:08:33,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:33,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:33,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:33,904 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:33,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-10 03:08:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:33,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:34,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:34,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:08:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:34,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:34,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:34,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:34,377 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:34,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-02-10 03:08:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:34,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975532311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:34,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:34,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:34,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698467960] [2022-02-10 03:08:34,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:34,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:34,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:34,391 INFO L87 Difference]: Start difference. First operand 625 states and 1707 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:34,742 INFO L93 Difference]: Finished difference Result 678 states and 1844 transitions. [2022-02-10 03:08:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:08:34,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:34,744 INFO L225 Difference]: With dead ends: 678 [2022-02-10 03:08:34,744 INFO L226 Difference]: Without dead ends: 678 [2022-02-10 03:08:34,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:08:34,744 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:34,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 124 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-02-10 03:08:34,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 621. [2022-02-10 03:08:34,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.732258064516129) internal successors, (1694), 620 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1694 transitions. [2022-02-10 03:08:34,750 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1694 transitions. Word has length 25 [2022-02-10 03:08:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:34,750 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1694 transitions. [2022-02-10 03:08:34,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1694 transitions. [2022-02-10 03:08:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:34,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:34,751 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:34,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-02-10 03:08:34,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:34,952 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:34,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1882288805, now seen corresponding path program 242 times [2022-02-10 03:08:34,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:34,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880979980] [2022-02-10 03:08:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:34,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:35,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:35,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880979980] [2022-02-10 03:08:35,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880979980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:35,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281584381] [2022-02-10 03:08:35,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:35,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:35,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:35,043 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:35,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-10 03:08:35,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:35,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:35,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:35,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:35,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:35,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:08:35,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:08:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:35,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:35,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:35,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:35,488 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:35,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-02-10 03:08:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:35,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281584381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:35,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:35,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:08:35,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738318416] [2022-02-10 03:08:35,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:35,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:35,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:35,493 INFO L87 Difference]: Start difference. First operand 621 states and 1694 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:35,834 INFO L93 Difference]: Finished difference Result 710 states and 1898 transitions. [2022-02-10 03:08:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:08:35,834 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:35,835 INFO L225 Difference]: With dead ends: 710 [2022-02-10 03:08:35,835 INFO L226 Difference]: Without dead ends: 698 [2022-02-10 03:08:35,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:08:35,835 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:35,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 127 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:35,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-10 03:08:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 637. [2022-02-10 03:08:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.7342767295597485) internal successors, (1739), 636 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1739 transitions. [2022-02-10 03:08:35,842 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1739 transitions. Word has length 25 [2022-02-10 03:08:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:35,842 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1739 transitions. [2022-02-10 03:08:35,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1739 transitions. [2022-02-10 03:08:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:35,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:35,842 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:35,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-02-10 03:08:36,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:36,043 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 72253221, now seen corresponding path program 243 times [2022-02-10 03:08:36,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:36,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176008480] [2022-02-10 03:08:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:36,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:36,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:36,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176008480] [2022-02-10 03:08:36,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176008480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:36,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543340607] [2022-02-10 03:08:36,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:36,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:36,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:36,168 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:36,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-10 03:08:36,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:36,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:36,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:36,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:36,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:36,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:36,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:36,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:08:36,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:08:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:36,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:36,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:36,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:36,875 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:36,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:36,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543340607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:36,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:36,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:08:36,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953781963] [2022-02-10 03:08:36,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:36,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:36,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:36,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:36,882 INFO L87 Difference]: Start difference. First operand 637 states and 1739 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:36,969 INFO L93 Difference]: Finished difference Result 672 states and 1829 transitions. [2022-02-10 03:08:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:36,971 INFO L225 Difference]: With dead ends: 672 [2022-02-10 03:08:36,971 INFO L226 Difference]: Without dead ends: 672 [2022-02-10 03:08:36,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:36,971 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:36,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 114 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-02-10 03:08:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-02-10 03:08:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 637. [2022-02-10 03:08:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.7342767295597485) internal successors, (1739), 636 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1739 transitions. [2022-02-10 03:08:36,980 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1739 transitions. Word has length 25 [2022-02-10 03:08:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:36,980 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1739 transitions. [2022-02-10 03:08:36,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1739 transitions. [2022-02-10 03:08:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:36,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:36,981 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:36,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-02-10 03:08:37,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:37,187 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1578550743, now seen corresponding path program 244 times [2022-02-10 03:08:37,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:37,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049496474] [2022-02-10 03:08:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:37,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:08:37,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:37,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049496474] [2022-02-10 03:08:37,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049496474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:37,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649997534] [2022-02-10 03:08:37,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:37,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:37,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:37,314 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:37,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-10 03:08:37,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:37,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:37,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:37,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:37,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:37,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:37,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:08:37,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-10 03:08:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:08:37,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:37,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:37,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:37,920 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:37,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:08:37,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649997534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:37,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:37,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:37,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216224485] [2022-02-10 03:08:37,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:37,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:37,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:37,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:37,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:37,927 INFO L87 Difference]: Start difference. First operand 637 states and 1739 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:37,994 INFO L93 Difference]: Finished difference Result 662 states and 1812 transitions. [2022-02-10 03:08:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:37,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:37,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:37,995 INFO L225 Difference]: With dead ends: 662 [2022-02-10 03:08:37,996 INFO L226 Difference]: Without dead ends: 662 [2022-02-10 03:08:37,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:37,996 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:37,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-02-10 03:08:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-02-10 03:08:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 638. [2022-02-10 03:08:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7346938775510203) internal successors, (1742), 637 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1742 transitions. [2022-02-10 03:08:38,002 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1742 transitions. Word has length 25 [2022-02-10 03:08:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:38,002 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1742 transitions. [2022-02-10 03:08:38,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1742 transitions. [2022-02-10 03:08:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:38,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:38,003 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:38,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-02-10 03:08:38,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:38,203 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash -102933165, now seen corresponding path program 245 times [2022-02-10 03:08:38,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:38,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347131446] [2022-02-10 03:08:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:38,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:08:38,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:38,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347131446] [2022-02-10 03:08:38,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347131446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:38,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661854979] [2022-02-10 03:08:38,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:38,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:38,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:38,316 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:38,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-10 03:08:38,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:38,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:38,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:38,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:38,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:38,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:38,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:08:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:08:38,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:38,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:38,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:38,882 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:38,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:08:38,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661854979] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:38,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:38,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:38,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849697027] [2022-02-10 03:08:38,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:38,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:38,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:38,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:38,889 INFO L87 Difference]: Start difference. First operand 638 states and 1742 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:38,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:38,972 INFO L93 Difference]: Finished difference Result 661 states and 1810 transitions. [2022-02-10 03:08:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:38,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:38,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:38,974 INFO L225 Difference]: With dead ends: 661 [2022-02-10 03:08:38,974 INFO L226 Difference]: Without dead ends: 661 [2022-02-10 03:08:38,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:38,974 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:38,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 110 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-02-10 03:08:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-02-10 03:08:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 621. [2022-02-10 03:08:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.732258064516129) internal successors, (1694), 620 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1694 transitions. [2022-02-10 03:08:38,980 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1694 transitions. Word has length 25 [2022-02-10 03:08:38,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:38,980 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1694 transitions. [2022-02-10 03:08:38,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1694 transitions. [2022-02-10 03:08:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:38,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:38,981 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:38,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-02-10 03:08:39,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:39,182 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1466643041, now seen corresponding path program 246 times [2022-02-10 03:08:39,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:39,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783761403] [2022-02-10 03:08:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:39,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:39,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:39,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783761403] [2022-02-10 03:08:39,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783761403] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:39,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081659811] [2022-02-10 03:08:39,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:39,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:39,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:39,293 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:39,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-10 03:08:39,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:08:39,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:39,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:39,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:39,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:39,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:39,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:39,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:39,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:39,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:39,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:39,863 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:39,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:39,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081659811] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:39,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:39,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:39,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553102411] [2022-02-10 03:08:39,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:39,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:39,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:39,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:39,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:39,871 INFO L87 Difference]: Start difference. First operand 621 states and 1694 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:40,230 INFO L93 Difference]: Finished difference Result 711 states and 1892 transitions. [2022-02-10 03:08:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:08:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:40,231 INFO L225 Difference]: With dead ends: 711 [2022-02-10 03:08:40,231 INFO L226 Difference]: Without dead ends: 711 [2022-02-10 03:08:40,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:08:40,231 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:40,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 123 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 327 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-02-10 03:08:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-02-10 03:08:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 626. [2022-02-10 03:08:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.744) internal successors, (1715), 625 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1715 transitions. [2022-02-10 03:08:40,238 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1715 transitions. Word has length 25 [2022-02-10 03:08:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:40,238 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1715 transitions. [2022-02-10 03:08:40,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1715 transitions. [2022-02-10 03:08:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:40,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:40,239 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:40,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-02-10 03:08:40,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:40,440 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:40,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1319109767, now seen corresponding path program 247 times [2022-02-10 03:08:40,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:40,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374104428] [2022-02-10 03:08:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:40,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:40,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:40,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374104428] [2022-02-10 03:08:40,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374104428] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:40,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619029110] [2022-02-10 03:08:40,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:40,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:40,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:40,558 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:40,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-10 03:08:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:40,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:40,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:40,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:40,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:40,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-02-10 03:08:40,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-10 03:08:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:41,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:41,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:41,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:41,184 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:41,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:41,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619029110] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:41,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:41,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:08:41,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693753151] [2022-02-10 03:08:41,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:41,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:41,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:41,191 INFO L87 Difference]: Start difference. First operand 626 states and 1715 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:41,293 INFO L93 Difference]: Finished difference Result 659 states and 1791 transitions. [2022-02-10 03:08:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:08:41,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:41,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:41,294 INFO L225 Difference]: With dead ends: 659 [2022-02-10 03:08:41,294 INFO L226 Difference]: Without dead ends: 651 [2022-02-10 03:08:41,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:41,295 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:41,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 107 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 201 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-02-10 03:08:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-10 03:08:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 621. [2022-02-10 03:08:41,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.732258064516129) internal successors, (1694), 620 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1694 transitions. [2022-02-10 03:08:41,301 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1694 transitions. Word has length 25 [2022-02-10 03:08:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:41,301 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1694 transitions. [2022-02-10 03:08:41,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1694 transitions. [2022-02-10 03:08:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:41,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:41,302 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:41,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:41,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-02-10 03:08:41,507 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash -490925817, now seen corresponding path program 248 times [2022-02-10 03:08:41,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:41,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443903941] [2022-02-10 03:08:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:41,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:41,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:41,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443903941] [2022-02-10 03:08:41,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443903941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:41,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865896135] [2022-02-10 03:08:41,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:41,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:41,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:41,666 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:41,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-10 03:08:41,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:41,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:41,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:41,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:41,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:41,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:41,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:41,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:41,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:42,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:42,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:42,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:42,294 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:42,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:42,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865896135] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:42,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:42,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:08:42,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247825110] [2022-02-10 03:08:42,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:42,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:42,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:42,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:42,301 INFO L87 Difference]: Start difference. First operand 621 states and 1694 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:42,543 INFO L93 Difference]: Finished difference Result 697 states and 1871 transitions. [2022-02-10 03:08:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:08:42,544 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:42,546 INFO L225 Difference]: With dead ends: 697 [2022-02-10 03:08:42,546 INFO L226 Difference]: Without dead ends: 697 [2022-02-10 03:08:42,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:08:42,546 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:42,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 114 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 289 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-02-10 03:08:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-02-10 03:08:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 624. [2022-02-10 03:08:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.738362760834671) internal successors, (1706), 623 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1706 transitions. [2022-02-10 03:08:42,554 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1706 transitions. Word has length 25 [2022-02-10 03:08:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:42,554 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1706 transitions. [2022-02-10 03:08:42,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1706 transitions. [2022-02-10 03:08:42,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:42,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:42,555 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:42,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:42,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-02-10 03:08:42,759 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:42,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1720817517, now seen corresponding path program 249 times [2022-02-10 03:08:42,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:42,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622586601] [2022-02-10 03:08:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:42,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:42,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:42,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622586601] [2022-02-10 03:08:42,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622586601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:42,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236999654] [2022-02-10 03:08:42,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:42,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:42,859 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:42,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-10 03:08:42,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:08:42,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:42,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:43,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:43,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:43,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:43,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:43,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:43,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:43,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:43,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:43,331 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:43,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:43,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236999654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:43,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:43,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:08:43,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131380796] [2022-02-10 03:08:43,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:43,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:43,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:43,338 INFO L87 Difference]: Start difference. First operand 624 states and 1706 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:43,463 INFO L93 Difference]: Finished difference Result 658 states and 1798 transitions. [2022-02-10 03:08:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:08:43,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:43,464 INFO L225 Difference]: With dead ends: 658 [2022-02-10 03:08:43,464 INFO L226 Difference]: Without dead ends: 654 [2022-02-10 03:08:43,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:43,465 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:43,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 94 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 119 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-02-10 03:08:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-02-10 03:08:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 624. [2022-02-10 03:08:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.736757624398074) internal successors, (1705), 623 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1705 transitions. [2022-02-10 03:08:43,471 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1705 transitions. Word has length 25 [2022-02-10 03:08:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:43,471 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1705 transitions. [2022-02-10 03:08:43,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1705 transitions. [2022-02-10 03:08:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:43,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:43,472 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:43,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-02-10 03:08:43,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-02-10 03:08:43,672 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:43,673 INFO L85 PathProgramCache]: Analyzing trace with hash -786187547, now seen corresponding path program 250 times [2022-02-10 03:08:43,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:43,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663413758] [2022-02-10 03:08:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:43,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:43,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:43,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663413758] [2022-02-10 03:08:43,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663413758] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:43,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630828436] [2022-02-10 03:08:43,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:43,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:43,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:43,802 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:43,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-10 03:08:43,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:43,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:43,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:43,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:43,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:44,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:44,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:44,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:44,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:44,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:44,394 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:44,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:44,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630828436] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:44,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:44,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:44,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403972805] [2022-02-10 03:08:44,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:44,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:44,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:44,401 INFO L87 Difference]: Start difference. First operand 624 states and 1705 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:44,598 INFO L93 Difference]: Finished difference Result 690 states and 1862 transitions. [2022-02-10 03:08:44,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:08:44,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:44,599 INFO L225 Difference]: With dead ends: 690 [2022-02-10 03:08:44,599 INFO L226 Difference]: Without dead ends: 690 [2022-02-10 03:08:44,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:08:44,599 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:44,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 87 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 212 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-02-10 03:08:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-10 03:08:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 621. [2022-02-10 03:08:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.732258064516129) internal successors, (1694), 620 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1694 transitions. [2022-02-10 03:08:44,606 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1694 transitions. Word has length 25 [2022-02-10 03:08:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:44,606 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1694 transitions. [2022-02-10 03:08:44,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1694 transitions. [2022-02-10 03:08:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:44,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:44,607 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:44,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-02-10 03:08:44,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-02-10 03:08:44,807 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:44,808 INFO L85 PathProgramCache]: Analyzing trace with hash 15466827, now seen corresponding path program 251 times [2022-02-10 03:08:44,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:44,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190097086] [2022-02-10 03:08:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:44,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:44,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:44,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190097086] [2022-02-10 03:08:44,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190097086] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:44,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303167271] [2022-02-10 03:08:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:44,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:44,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:44,913 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:44,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-10 03:08:44,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:08:44,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:44,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:44,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:45,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:45,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:45,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:45,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:45,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:45,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:08:45,435 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:45,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:45,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303167271] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:45,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:45,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:45,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041748726] [2022-02-10 03:08:45,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:45,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:45,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:45,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:45,441 INFO L87 Difference]: Start difference. First operand 621 states and 1694 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:46,161 INFO L93 Difference]: Finished difference Result 979 states and 2529 transitions. [2022-02-10 03:08:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:08:46,162 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:46,163 INFO L225 Difference]: With dead ends: 979 [2022-02-10 03:08:46,163 INFO L226 Difference]: Without dead ends: 979 [2022-02-10 03:08:46,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:08:46,164 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 140 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:46,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 156 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-02-10 03:08:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 637. [2022-02-10 03:08:46,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.74685534591195) internal successors, (1747), 636 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1747 transitions. [2022-02-10 03:08:46,171 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1747 transitions. Word has length 25 [2022-02-10 03:08:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:46,171 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1747 transitions. [2022-02-10 03:08:46,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1747 transitions. [2022-02-10 03:08:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:46,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:46,172 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:46,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-02-10 03:08:46,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:46,372 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:46,373 INFO L85 PathProgramCache]: Analyzing trace with hash -279794903, now seen corresponding path program 252 times [2022-02-10 03:08:46,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:46,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998896524] [2022-02-10 03:08:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:46,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:46,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:46,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998896524] [2022-02-10 03:08:46,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998896524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:46,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71228584] [2022-02-10 03:08:46,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:46,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:46,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:46,485 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:46,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-10 03:08:46,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:08:46,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:46,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:46,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:46,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:46,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:46,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:46,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:46,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:47,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:47,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:08:47,051 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:47,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:47,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71228584] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:47,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:47,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:08:47,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667336835] [2022-02-10 03:08:47,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:47,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:47,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:47,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:47,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:47,058 INFO L87 Difference]: Start difference. First operand 637 states and 1747 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:47,173 INFO L93 Difference]: Finished difference Result 707 states and 1916 transitions. [2022-02-10 03:08:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:08:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:47,175 INFO L225 Difference]: With dead ends: 707 [2022-02-10 03:08:47,175 INFO L226 Difference]: Without dead ends: 707 [2022-02-10 03:08:47,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:47,175 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:47,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 110 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 291 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-02-10 03:08:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-02-10 03:08:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 638. [2022-02-10 03:08:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7441130298273158) internal successors, (1748), 637 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1748 transitions. [2022-02-10 03:08:47,182 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1748 transitions. Word has length 25 [2022-02-10 03:08:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:47,182 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1748 transitions. [2022-02-10 03:08:47,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1748 transitions. [2022-02-10 03:08:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:47,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:47,183 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:47,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-02-10 03:08:47,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-02-10 03:08:47,384 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash 898779919, now seen corresponding path program 253 times [2022-02-10 03:08:47,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:47,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033936772] [2022-02-10 03:08:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:47,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:47,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:47,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033936772] [2022-02-10 03:08:47,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033936772] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:47,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605007506] [2022-02-10 03:08:47,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:47,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:47,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:47,484 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:47,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-10 03:08:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:47,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:47,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:47,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:47,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:08:47,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:08:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:47,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:47,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:47,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:08:47,996 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:47,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:48,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605007506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:48,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:48,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:08:48,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892958781] [2022-02-10 03:08:48,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:48,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:08:48,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:48,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:08:48,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:48,002 INFO L87 Difference]: Start difference. First operand 638 states and 1748 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:48,090 INFO L93 Difference]: Finished difference Result 720 states and 1957 transitions. [2022-02-10 03:08:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:48,091 INFO L225 Difference]: With dead ends: 720 [2022-02-10 03:08:48,092 INFO L226 Difference]: Without dead ends: 720 [2022-02-10 03:08:48,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:48,092 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:48,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 85 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2022-02-10 03:08:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-02-10 03:08:48,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 638. [2022-02-10 03:08:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7441130298273158) internal successors, (1748), 637 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1748 transitions. [2022-02-10 03:08:48,098 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1748 transitions. Word has length 25 [2022-02-10 03:08:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:48,098 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1748 transitions. [2022-02-10 03:08:48,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1748 transitions. [2022-02-10 03:08:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:48,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:48,099 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:48,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:48,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:48,300 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1300470807, now seen corresponding path program 254 times [2022-02-10 03:08:48,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:48,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288612709] [2022-02-10 03:08:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:48,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:48,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:48,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288612709] [2022-02-10 03:08:48,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288612709] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:48,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872913672] [2022-02-10 03:08:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:48,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:48,417 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:48,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-10 03:08:48,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:48,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:48,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:48,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:08:48,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:08:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:48,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:48,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:48,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-10 03:08:48,750 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:48,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:48,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872913672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:48,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:48,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:08:48,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036004119] [2022-02-10 03:08:48,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:48,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:08:48,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:08:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:08:48,755 INFO L87 Difference]: Start difference. First operand 638 states and 1748 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:49,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:49,436 INFO L93 Difference]: Finished difference Result 812 states and 2136 transitions. [2022-02-10 03:08:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:08:49,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:49,437 INFO L225 Difference]: With dead ends: 812 [2022-02-10 03:08:49,437 INFO L226 Difference]: Without dead ends: 808 [2022-02-10 03:08:49,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:08:49,438 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:49,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 105 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-02-10 03:08:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 646. [2022-02-10 03:08:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.724031007751938) internal successors, (1757), 645 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1757 transitions. [2022-02-10 03:08:49,454 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1757 transitions. Word has length 25 [2022-02-10 03:08:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:49,454 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1757 transitions. [2022-02-10 03:08:49,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1757 transitions. [2022-02-10 03:08:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:49,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:49,455 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:49,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:49,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:49,656 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash 560359307, now seen corresponding path program 255 times [2022-02-10 03:08:49,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:49,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790547111] [2022-02-10 03:08:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:49,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:49,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:49,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790547111] [2022-02-10 03:08:49,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790547111] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:49,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783316935] [2022-02-10 03:08:49,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:49,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:49,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:49,776 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:49,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-10 03:08:49,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:08:49,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:49,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:49,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:49,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:49,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:08:49,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:08:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:49,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:50,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:50,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-10 03:08:50,117 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:50,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:50,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783316935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:50,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:50,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:08:50,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502863865] [2022-02-10 03:08:50,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:50,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:50,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:50,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:50,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:50,123 INFO L87 Difference]: Start difference. First operand 646 states and 1757 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:50,747 INFO L93 Difference]: Finished difference Result 800 states and 2118 transitions. [2022-02-10 03:08:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:08:50,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:50,749 INFO L225 Difference]: With dead ends: 800 [2022-02-10 03:08:50,749 INFO L226 Difference]: Without dead ends: 790 [2022-02-10 03:08:50,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:08:50,749 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 145 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:50,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 104 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:08:50,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-02-10 03:08:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 638. [2022-02-10 03:08:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7425431711145998) internal successors, (1747), 637 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1747 transitions. [2022-02-10 03:08:50,756 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1747 transitions. Word has length 25 [2022-02-10 03:08:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:50,756 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1747 transitions. [2022-02-10 03:08:50,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1747 transitions. [2022-02-10 03:08:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:50,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:50,757 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:50,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-02-10 03:08:50,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:50,958 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1081202597, now seen corresponding path program 256 times [2022-02-10 03:08:50,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:50,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487007020] [2022-02-10 03:08:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:50,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:51,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:51,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487007020] [2022-02-10 03:08:51,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487007020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:51,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376358839] [2022-02-10 03:08:51,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:51,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:51,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:51,055 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:51,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-10 03:08:51,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:51,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:51,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:51,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:51,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:08:51,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:08:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:51,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:51,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:51,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:08:51,457 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:08:51,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:08:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:51,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376358839] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:51,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:51,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:08:51,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244991217] [2022-02-10 03:08:51,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:51,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:51,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:51,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:51,462 INFO L87 Difference]: Start difference. First operand 638 states and 1747 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:51,952 INFO L93 Difference]: Finished difference Result 991 states and 2563 transitions. [2022-02-10 03:08:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:08:51,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:51,953 INFO L225 Difference]: With dead ends: 991 [2022-02-10 03:08:51,953 INFO L226 Difference]: Without dead ends: 991 [2022-02-10 03:08:51,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:08:51,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 130 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:51,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 230 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:08:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-02-10 03:08:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 631. [2022-02-10 03:08:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.749206349206349) internal successors, (1732), 630 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1732 transitions. [2022-02-10 03:08:51,961 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1732 transitions. Word has length 25 [2022-02-10 03:08:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:51,961 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1732 transitions. [2022-02-10 03:08:51,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1732 transitions. [2022-02-10 03:08:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:51,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:51,962 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:51,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-02-10 03:08:52,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:52,163 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:52,163 INFO L85 PathProgramCache]: Analyzing trace with hash -923704565, now seen corresponding path program 257 times [2022-02-10 03:08:52,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:52,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624642104] [2022-02-10 03:08:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:52,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:52,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:52,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624642104] [2022-02-10 03:08:52,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624642104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:52,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357488404] [2022-02-10 03:08:52,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:52,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:52,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:52,286 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:52,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-10 03:08:52,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:08:52,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:52,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:52,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:52,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:52,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:52,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:52,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:08:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:52,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:52,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:52,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:52,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:52,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:52,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:52,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:08:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:52,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357488404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:52,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:52,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:52,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856296640] [2022-02-10 03:08:52,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:52,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:52,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:52,760 INFO L87 Difference]: Start difference. First operand 631 states and 1732 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:52,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:52,983 INFO L93 Difference]: Finished difference Result 674 states and 1822 transitions. [2022-02-10 03:08:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:08:52,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:52,984 INFO L225 Difference]: With dead ends: 674 [2022-02-10 03:08:52,984 INFO L226 Difference]: Without dead ends: 674 [2022-02-10 03:08:52,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:08:52,984 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:52,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 101 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 403 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2022-02-10 03:08:52,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-02-10 03:08:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 632. [2022-02-10 03:08:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.7496038034865293) internal successors, (1735), 631 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1735 transitions. [2022-02-10 03:08:52,991 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1735 transitions. Word has length 25 [2022-02-10 03:08:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:52,991 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1735 transitions. [2022-02-10 03:08:52,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1735 transitions. [2022-02-10 03:08:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:52,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:52,992 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:53,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-02-10 03:08:53,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2022-02-10 03:08:53,192 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1679125643, now seen corresponding path program 258 times [2022-02-10 03:08:53,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:53,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827336473] [2022-02-10 03:08:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:53,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:53,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:53,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827336473] [2022-02-10 03:08:53,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827336473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:53,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163824734] [2022-02-10 03:08:53,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:53,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:53,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:53,283 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:53,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-10 03:08:53,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:08:53,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:53,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:53,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:53,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:53,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:53,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:53,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:53,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:53,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:08:53,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:53,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:53,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163824734] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:53,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:53,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:08:53,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608735228] [2022-02-10 03:08:53,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:53,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:53,739 INFO L87 Difference]: Start difference. First operand 632 states and 1735 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:53,903 INFO L93 Difference]: Finished difference Result 653 states and 1793 transitions. [2022-02-10 03:08:53,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:08:53,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:53,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:53,904 INFO L225 Difference]: With dead ends: 653 [2022-02-10 03:08:53,904 INFO L226 Difference]: Without dead ends: 653 [2022-02-10 03:08:53,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:53,904 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:53,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 386 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2022-02-10 03:08:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-02-10 03:08:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 635. [2022-02-10 03:08:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 2.7507886435331232) internal successors, (1744), 634 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1744 transitions. [2022-02-10 03:08:53,911 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1744 transitions. Word has length 25 [2022-02-10 03:08:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:53,911 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1744 transitions. [2022-02-10 03:08:53,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1744 transitions. [2022-02-10 03:08:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:53,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:53,912 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:53,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-02-10 03:08:54,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-02-10 03:08:54,112 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1974387373, now seen corresponding path program 259 times [2022-02-10 03:08:54,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:54,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671469278] [2022-02-10 03:08:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:54,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:54,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:54,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671469278] [2022-02-10 03:08:54,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671469278] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:54,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246702366] [2022-02-10 03:08:54,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:08:54,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:54,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:54,248 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:54,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-10 03:08:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:54,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:54,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:54,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:54,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:08:54,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:54,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2022-02-10 03:08:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:54,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:54,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:54,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:54,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:54,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:54,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:54,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:08:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:54,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246702366] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:54,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:54,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:54,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681383476] [2022-02-10 03:08:54,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:54,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:54,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:54,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:54,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:54,794 INFO L87 Difference]: Start difference. First operand 635 states and 1744 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:54,928 INFO L93 Difference]: Finished difference Result 651 states and 1790 transitions. [2022-02-10 03:08:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:08:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:54,929 INFO L225 Difference]: With dead ends: 651 [2022-02-10 03:08:54,929 INFO L226 Difference]: Without dead ends: 651 [2022-02-10 03:08:54,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:08:54,929 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:54,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 296 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-02-10 03:08:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-10 03:08:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 641. [2022-02-10 03:08:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.75625) internal successors, (1764), 640 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1764 transitions. [2022-02-10 03:08:54,935 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1764 transitions. Word has length 25 [2022-02-10 03:08:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:54,936 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1764 transitions. [2022-02-10 03:08:54,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1764 transitions. [2022-02-10 03:08:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:54,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:54,936 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:54,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-02-10 03:08:55,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-02-10 03:08:55,137 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:55,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1273851325, now seen corresponding path program 260 times [2022-02-10 03:08:55,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:55,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437906957] [2022-02-10 03:08:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:55,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:55,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:55,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437906957] [2022-02-10 03:08:55,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437906957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:55,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209230950] [2022-02-10 03:08:55,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:08:55,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:55,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:55,230 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:55,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-10 03:08:55,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:08:55,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:55,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:55,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:55,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:55,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:55,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:55,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:08:55,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:55,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:08:55,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:55,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:55,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209230950] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:55,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:55,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:08:55,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359301764] [2022-02-10 03:08:55,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:55,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:08:55,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:08:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:08:55,688 INFO L87 Difference]: Start difference. First operand 641 states and 1764 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:55,823 INFO L93 Difference]: Finished difference Result 678 states and 1861 transitions. [2022-02-10 03:08:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:08:55,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:55,824 INFO L225 Difference]: With dead ends: 678 [2022-02-10 03:08:55,824 INFO L226 Difference]: Without dead ends: 678 [2022-02-10 03:08:55,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:08:55,824 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:55,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 306 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-02-10 03:08:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-02-10 03:08:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 641. [2022-02-10 03:08:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.75625) internal successors, (1764), 640 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1764 transitions. [2022-02-10 03:08:55,840 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1764 transitions. Word has length 25 [2022-02-10 03:08:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:55,840 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1764 transitions. [2022-02-10 03:08:55,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1764 transitions. [2022-02-10 03:08:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:55,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:55,841 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:55,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-02-10 03:08:56,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:56,042 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash -585653801, now seen corresponding path program 261 times [2022-02-10 03:08:56,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:56,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541439383] [2022-02-10 03:08:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:56,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:56,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:56,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541439383] [2022-02-10 03:08:56,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541439383] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:56,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293883242] [2022-02-10 03:08:56,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:08:56,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:56,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:56,144 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:56,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-10 03:08:56,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:08:56,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:56,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:56,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:56,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:56,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:56,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:56,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:56,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:56,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:08:56,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:56,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:56,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:56,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:08:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:56,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293883242] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:56,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:56,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:08:56,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465669529] [2022-02-10 03:08:56,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:56,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:08:56,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:56,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:08:56,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:08:56,594 INFO L87 Difference]: Start difference. First operand 641 states and 1764 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:56,819 INFO L93 Difference]: Finished difference Result 710 states and 1904 transitions. [2022-02-10 03:08:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:08:56,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:56,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:56,821 INFO L225 Difference]: With dead ends: 710 [2022-02-10 03:08:56,821 INFO L226 Difference]: Without dead ends: 690 [2022-02-10 03:08:56,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:56,821 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:56,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 121 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 322 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-02-10 03:08:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-10 03:08:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 641. [2022-02-10 03:08:56,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.75625) internal successors, (1764), 640 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1764 transitions. [2022-02-10 03:08:56,827 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1764 transitions. Word has length 25 [2022-02-10 03:08:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:56,828 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1764 transitions. [2022-02-10 03:08:56,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1764 transitions. [2022-02-10 03:08:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:56,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:56,829 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:56,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-02-10 03:08:57,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-02-10 03:08:57,030 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:57,030 INFO L85 PathProgramCache]: Analyzing trace with hash -112110957, now seen corresponding path program 262 times [2022-02-10 03:08:57,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:57,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63220773] [2022-02-10 03:08:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:57,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:57,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:57,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63220773] [2022-02-10 03:08:57,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63220773] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:57,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188063093] [2022-02-10 03:08:57,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:08:57,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:57,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:57,168 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:57,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-10 03:08:57,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:08:57,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:08:57,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:57,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:57,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:08:57,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:57,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:08:57,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:57,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:08:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:57,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:57,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:57,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:57,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:57,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:57,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:57,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:08:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:57,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188063093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:57,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:57,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:08:57,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164816570] [2022-02-10 03:08:57,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:57,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:08:57,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:08:57,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:08:57,753 INFO L87 Difference]: Start difference. First operand 641 states and 1764 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:57,985 INFO L93 Difference]: Finished difference Result 727 states and 1944 transitions. [2022-02-10 03:08:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:08:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:57,987 INFO L225 Difference]: With dead ends: 727 [2022-02-10 03:08:57,987 INFO L226 Difference]: Without dead ends: 727 [2022-02-10 03:08:57,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:08:57,987 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:57,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 110 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 402 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-02-10 03:08:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-02-10 03:08:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 642. [2022-02-10 03:08:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.7581903276131046) internal successors, (1768), 641 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1768 transitions. [2022-02-10 03:08:57,994 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1768 transitions. Word has length 25 [2022-02-10 03:08:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:57,994 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1768 transitions. [2022-02-10 03:08:57,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1768 transitions. [2022-02-10 03:08:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:57,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:57,995 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:58,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-02-10 03:08:58,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-02-10 03:08:58,196 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:58,196 INFO L85 PathProgramCache]: Analyzing trace with hash 293163361, now seen corresponding path program 263 times [2022-02-10 03:08:58,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:58,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545359775] [2022-02-10 03:08:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:58,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:58,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:58,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545359775] [2022-02-10 03:08:58,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545359775] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:58,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481170371] [2022-02-10 03:08:58,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:08:58,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:58,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:58,329 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:58,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-10 03:08:58,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:08:58,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:58,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:58,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:58,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:58,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:58,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:58,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:58,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:58,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:08:58,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:58,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:08:58,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:58,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:08:58,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:08:58,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:08:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:58,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481170371] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:08:58,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:08:58,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:08:58,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010575079] [2022-02-10 03:08:58,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:08:58,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:08:58,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:08:58,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:08:58,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:08:58,896 INFO L87 Difference]: Start difference. First operand 642 states and 1768 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:08:59,217 INFO L93 Difference]: Finished difference Result 736 states and 1971 transitions. [2022-02-10 03:08:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:08:59,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:08:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:08:59,219 INFO L225 Difference]: With dead ends: 736 [2022-02-10 03:08:59,219 INFO L226 Difference]: Without dead ends: 736 [2022-02-10 03:08:59,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:08:59,219 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:08:59,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 126 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 465 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-02-10 03:08:59,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-02-10 03:08:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 647. [2022-02-10 03:08:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.7693498452012384) internal successors, (1789), 646 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1789 transitions. [2022-02-10 03:08:59,226 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1789 transitions. Word has length 25 [2022-02-10 03:08:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:08:59,226 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1789 transitions. [2022-02-10 03:08:59,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:08:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1789 transitions. [2022-02-10 03:08:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:08:59,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:08:59,227 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:08:59,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-02-10 03:08:59,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:59,427 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:08:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:08:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash 145630087, now seen corresponding path program 264 times [2022-02-10 03:08:59,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:08:59,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920603612] [2022-02-10 03:08:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:08:59,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:08:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:08:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:59,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:08:59,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920603612] [2022-02-10 03:08:59,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920603612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:08:59,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293691214] [2022-02-10 03:08:59,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:08:59,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:08:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:08:59,550 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:08:59,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-10 03:08:59,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:08:59,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:08:59,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:08:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:08:59,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:59,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:08:59,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:59,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:08:59,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:08:59,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:08:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:08:59,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:00,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:00,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:00,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:00,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:00,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:00,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:00,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293691214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:00,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:00,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:09:00,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965964657] [2022-02-10 03:09:00,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:00,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:00,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:00,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:00,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:00,138 INFO L87 Difference]: Start difference. First operand 647 states and 1789 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:00,430 INFO L93 Difference]: Finished difference Result 697 states and 1876 transitions. [2022-02-10 03:09:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:09:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:00,432 INFO L225 Difference]: With dead ends: 697 [2022-02-10 03:09:00,432 INFO L226 Difference]: Without dead ends: 689 [2022-02-10 03:09:00,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:09:00,432 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:00,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 86 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 297 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-02-10 03:09:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-02-10 03:09:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 641. [2022-02-10 03:09:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.75625) internal successors, (1764), 640 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1764 transitions. [2022-02-10 03:09:00,438 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1764 transitions. Word has length 25 [2022-02-10 03:09:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:00,438 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1764 transitions. [2022-02-10 03:09:00,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1764 transitions. [2022-02-10 03:09:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:00,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:00,439 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:00,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:00,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-02-10 03:09:00,640 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1664405497, now seen corresponding path program 265 times [2022-02-10 03:09:00,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:00,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371956420] [2022-02-10 03:09:00,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:00,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:00,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:00,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371956420] [2022-02-10 03:09:00,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371956420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:00,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645685546] [2022-02-10 03:09:00,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:00,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:00,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:00,786 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:00,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-10 03:09:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:00,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:00,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:01,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:01,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:01,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:01,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:01,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:01,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:01,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:01,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:01,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:01,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:01,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:09:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:01,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645685546] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:01,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:01,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:01,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080773646] [2022-02-10 03:09:01,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:01,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:01,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:01,378 INFO L87 Difference]: Start difference. First operand 641 states and 1764 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:01,644 INFO L93 Difference]: Finished difference Result 691 states and 1872 transitions. [2022-02-10 03:09:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:01,646 INFO L225 Difference]: With dead ends: 691 [2022-02-10 03:09:01,646 INFO L226 Difference]: Without dead ends: 691 [2022-02-10 03:09:01,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:01,646 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:01,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 137 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 412 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-02-10 03:09:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-10 03:09:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 645. [2022-02-10 03:09:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7639751552795033) internal successors, (1780), 644 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1780 transitions. [2022-02-10 03:09:01,655 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1780 transitions. Word has length 25 [2022-02-10 03:09:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:01,655 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1780 transitions. [2022-02-10 03:09:01,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1780 transitions. [2022-02-10 03:09:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:01,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:01,656 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:01,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-02-10 03:09:01,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:01,879 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash 547337837, now seen corresponding path program 266 times [2022-02-10 03:09:01,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:01,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255290288] [2022-02-10 03:09:01,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:01,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:02,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:02,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255290288] [2022-02-10 03:09:02,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255290288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:02,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546029151] [2022-02-10 03:09:02,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:02,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:02,012 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:02,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-10 03:09:02,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:02,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:02,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:02,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:02,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:02,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:02,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:02,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:02,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:02,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:02,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:02,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:02,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:02,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:02,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:02,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:02,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546029151] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:02,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:02,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:02,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667318698] [2022-02-10 03:09:02,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:02,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:02,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:02,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:02,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:02,499 INFO L87 Difference]: Start difference. First operand 645 states and 1780 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:02,810 INFO L93 Difference]: Finished difference Result 668 states and 1833 transitions. [2022-02-10 03:09:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:09:02,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:02,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:02,811 INFO L225 Difference]: With dead ends: 668 [2022-02-10 03:09:02,811 INFO L226 Difference]: Without dead ends: 660 [2022-02-10 03:09:02,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:09:02,812 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:02,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 79 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 329 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-02-10 03:09:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-02-10 03:09:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 646. [2022-02-10 03:09:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.764341085271318) internal successors, (1783), 645 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1783 transitions. [2022-02-10 03:09:02,818 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1783 transitions. Word has length 25 [2022-02-10 03:09:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:02,818 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1783 transitions. [2022-02-10 03:09:02,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1783 transitions. [2022-02-10 03:09:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:02,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:02,819 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:02,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:03,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:03,019 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1959667227, now seen corresponding path program 267 times [2022-02-10 03:09:03,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:03,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132166181] [2022-02-10 03:09:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:03,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:03,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:03,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132166181] [2022-02-10 03:09:03,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132166181] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:03,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502517588] [2022-02-10 03:09:03,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:03,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:03,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:03,159 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:03,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-10 03:09:03,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:09:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:09:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:03,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:03,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:03,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:03,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:03,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:03,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:03,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:03,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:03,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:03,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:03,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:03,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:03,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:09:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:03,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502517588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:03,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:03,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 23 [2022-02-10 03:09:03,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9128107] [2022-02-10 03:09:03,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:03,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:09:03,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:03,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:09:03,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:03,744 INFO L87 Difference]: Start difference. First operand 646 states and 1783 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:04,061 INFO L93 Difference]: Finished difference Result 688 states and 1881 transitions. [2022-02-10 03:09:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:04,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:04,062 INFO L225 Difference]: With dead ends: 688 [2022-02-10 03:09:04,062 INFO L226 Difference]: Without dead ends: 688 [2022-02-10 03:09:04,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:09:04,063 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:04,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 113 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 364 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-02-10 03:09:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-02-10 03:09:04,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 643. [2022-02-10 03:09:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.7601246105919004) internal successors, (1772), 642 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1772 transitions. [2022-02-10 03:09:04,069 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1772 transitions. Word has length 25 [2022-02-10 03:09:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:04,069 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1772 transitions. [2022-02-10 03:09:04,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1772 transitions. [2022-02-10 03:09:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:04,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:04,070 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:04,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:04,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2022-02-10 03:09:04,270 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:04,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1570125949, now seen corresponding path program 268 times [2022-02-10 03:09:04,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:04,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411094185] [2022-02-10 03:09:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:04,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:04,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:04,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411094185] [2022-02-10 03:09:04,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411094185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:04,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576551648] [2022-02-10 03:09:04,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:04,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:04,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:04,387 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:04,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-10 03:09:04,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:04,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:04,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:04,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:04,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:04,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:04,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:04,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:09:04,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:04,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:09:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:04,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:04,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:04,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-10 03:09:04,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:04,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:09:04,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:04,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:09:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:04,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576551648] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:04,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:04,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:04,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485405301] [2022-02-10 03:09:04,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:04,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:04,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:04,934 INFO L87 Difference]: Start difference. First operand 643 states and 1772 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:05,091 INFO L93 Difference]: Finished difference Result 652 states and 1786 transitions. [2022-02-10 03:09:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:05,092 INFO L225 Difference]: With dead ends: 652 [2022-02-10 03:09:05,092 INFO L226 Difference]: Without dead ends: 643 [2022-02-10 03:09:05,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:05,092 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:05,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 86 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-02-10 03:09:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-02-10 03:09:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 642. [2022-02-10 03:09:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.7566302652106085) internal successors, (1767), 641 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1767 transitions. [2022-02-10 03:09:05,098 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1767 transitions. Word has length 25 [2022-02-10 03:09:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:05,099 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1767 transitions. [2022-02-10 03:09:05,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1767 transitions. [2022-02-10 03:09:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:05,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:05,099 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:05,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-02-10 03:09:05,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-02-10 03:09:05,300 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:05,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1230382449, now seen corresponding path program 269 times [2022-02-10 03:09:05,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:05,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004385171] [2022-02-10 03:09:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:05,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:05,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:05,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004385171] [2022-02-10 03:09:05,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004385171] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:05,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022773589] [2022-02-10 03:09:05,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:05,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:05,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:05,452 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:05,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-10 03:09:05,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:09:05,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:05,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:05,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:05,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:05,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:05,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:09:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:05,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:05,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:05,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:05,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:05,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:05,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:05,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:09:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:06,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022773589] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:06,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:06,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:06,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163108447] [2022-02-10 03:09:06,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:06,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:06,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:06,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:06,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:06,046 INFO L87 Difference]: Start difference. First operand 642 states and 1767 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:06,372 INFO L93 Difference]: Finished difference Result 662 states and 1813 transitions. [2022-02-10 03:09:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:06,372 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:06,373 INFO L225 Difference]: With dead ends: 662 [2022-02-10 03:09:06,373 INFO L226 Difference]: Without dead ends: 662 [2022-02-10 03:09:06,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:09:06,374 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:06,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 129 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 418 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-02-10 03:09:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-02-10 03:09:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 641. [2022-02-10 03:09:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.75625) internal successors, (1764), 640 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1764 transitions. [2022-02-10 03:09:06,380 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1764 transitions. Word has length 25 [2022-02-10 03:09:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:06,380 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1764 transitions. [2022-02-10 03:09:06,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1764 transitions. [2022-02-10 03:09:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:06,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:06,381 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:06,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-02-10 03:09:06,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:06,581 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:06,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:06,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1148864579, now seen corresponding path program 270 times [2022-02-10 03:09:06,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:06,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663018607] [2022-02-10 03:09:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:06,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:06,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:06,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663018607] [2022-02-10 03:09:06,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663018607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:06,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786282227] [2022-02-10 03:09:06,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:06,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:06,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:06,712 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:06,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-10 03:09:06,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:09:06,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:06,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:06,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:06,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:07,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:07,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:07,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:07,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:07,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:07,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:07,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:07,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:07,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:07,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:07,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:07,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786282227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:07,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:07,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:09:07,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096758554] [2022-02-10 03:09:07,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:07,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:07,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:07,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:07,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:07,359 INFO L87 Difference]: Start difference. First operand 641 states and 1764 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:07,585 INFO L93 Difference]: Finished difference Result 709 states and 1908 transitions. [2022-02-10 03:09:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:07,587 INFO L225 Difference]: With dead ends: 709 [2022-02-10 03:09:07,587 INFO L226 Difference]: Without dead ends: 709 [2022-02-10 03:09:07,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:07,587 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:07,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 124 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 364 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-02-10 03:09:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-02-10 03:09:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 646. [2022-02-10 03:09:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.7581395348837208) internal successors, (1779), 645 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1779 transitions. [2022-02-10 03:09:07,594 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1779 transitions. Word has length 25 [2022-02-10 03:09:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:07,594 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1779 transitions. [2022-02-10 03:09:07,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1779 transitions. [2022-02-10 03:09:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:07,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:07,595 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:07,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-02-10 03:09:07,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-02-10 03:09:07,795 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:07,795 INFO L85 PathProgramCache]: Analyzing trace with hash 853602849, now seen corresponding path program 271 times [2022-02-10 03:09:07,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:07,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238483264] [2022-02-10 03:09:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:07,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:07,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:07,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238483264] [2022-02-10 03:09:07,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238483264] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:07,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283921551] [2022-02-10 03:09:07,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:07,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:07,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:07,929 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:07,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-10 03:09:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:08,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:08,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:08,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:08,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:08,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:08,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:08,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:08,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:08,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:08,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:08,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:08,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:08,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:08,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283921551] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:08,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:08,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:08,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914700795] [2022-02-10 03:09:08,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:08,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:08,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:08,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:08,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:08,566 INFO L87 Difference]: Start difference. First operand 646 states and 1779 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:08,859 INFO L93 Difference]: Finished difference Result 710 states and 1922 transitions. [2022-02-10 03:09:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:08,860 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:08,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:08,861 INFO L225 Difference]: With dead ends: 710 [2022-02-10 03:09:08,861 INFO L226 Difference]: Without dead ends: 710 [2022-02-10 03:09:08,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:09:08,861 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:08,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 108 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 317 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-02-10 03:09:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-02-10 03:09:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 643. [2022-02-10 03:09:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.7538940809968846) internal successors, (1768), 642 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1768 transitions. [2022-02-10 03:09:08,868 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1768 transitions. Word has length 25 [2022-02-10 03:09:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:08,868 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1768 transitions. [2022-02-10 03:09:08,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1768 transitions. [2022-02-10 03:09:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:08,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:08,869 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:08,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-02-10 03:09:09,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-02-10 03:09:09,070 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1582887627, now seen corresponding path program 272 times [2022-02-10 03:09:09,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:09,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002796389] [2022-02-10 03:09:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:09,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:09,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:09,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002796389] [2022-02-10 03:09:09,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002796389] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:09,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030801757] [2022-02-10 03:09:09,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:09,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:09,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:09,202 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:09,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-10 03:09:09,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:09,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:09,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:09,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:09,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:09,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:09,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:09,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:09,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:09,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:09:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:09,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:09,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:09,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:09,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:09,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:09,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:09,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:09,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030801757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:09,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:09,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:09,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151460074] [2022-02-10 03:09:09,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:09,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:09,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:09,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:09,822 INFO L87 Difference]: Start difference. First operand 643 states and 1768 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:10,022 INFO L93 Difference]: Finished difference Result 668 states and 1826 transitions. [2022-02-10 03:09:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:10,024 INFO L225 Difference]: With dead ends: 668 [2022-02-10 03:09:10,024 INFO L226 Difference]: Without dead ends: 668 [2022-02-10 03:09:10,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:09:10,024 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:10,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 73 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-02-10 03:09:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-02-10 03:09:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 642. [2022-02-10 03:09:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.7535101404056164) internal successors, (1765), 641 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1765 transitions. [2022-02-10 03:09:10,030 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1765 transitions. Word has length 25 [2022-02-10 03:09:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:10,030 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1765 transitions. [2022-02-10 03:09:10,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1765 transitions. [2022-02-10 03:09:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:10,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:10,031 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:10,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:10,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-02-10 03:09:10,232 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash -240736825, now seen corresponding path program 273 times [2022-02-10 03:09:10,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:10,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092432720] [2022-02-10 03:09:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:10,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:10,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:10,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092432720] [2022-02-10 03:09:10,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092432720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:10,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426716917] [2022-02-10 03:09:10,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:10,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:10,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:10,347 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:10,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-10 03:09:10,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:10,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:10,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:10,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:10,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:10,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:10,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:10,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:10,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:10,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:10,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:09:10,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:10,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:10,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:10,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:10,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426716917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:10,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:10,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:09:10,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247871260] [2022-02-10 03:09:10,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:10,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:10,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:10,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:10,933 INFO L87 Difference]: Start difference. First operand 642 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:11,319 INFO L93 Difference]: Finished difference Result 939 states and 2431 transitions. [2022-02-10 03:09:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:09:11,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:11,320 INFO L225 Difference]: With dead ends: 939 [2022-02-10 03:09:11,320 INFO L226 Difference]: Without dead ends: 939 [2022-02-10 03:09:11,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:09:11,321 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 105 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:11,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 163 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 389 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-02-10 03:09:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-02-10 03:09:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 657. [2022-02-10 03:09:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.7576219512195124) internal successors, (1809), 656 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1809 transitions. [2022-02-10 03:09:11,328 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1809 transitions. Word has length 25 [2022-02-10 03:09:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:11,328 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1809 transitions. [2022-02-10 03:09:11,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1809 transitions. [2022-02-10 03:09:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:11,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:11,329 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:11,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-02-10 03:09:11,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:11,529 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash -535998555, now seen corresponding path program 274 times [2022-02-10 03:09:11,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:11,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572220643] [2022-02-10 03:09:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:11,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:11,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:11,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572220643] [2022-02-10 03:09:11,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572220643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:11,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561894360] [2022-02-10 03:09:11,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:11,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:11,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:11,638 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:11,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-10 03:09:11,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:11,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:11,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:11,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:11,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:11,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:11,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:11,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:12,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:12,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:09:12,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:12,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:12,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:12,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:12,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561894360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:12,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:12,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:09:12,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63773589] [2022-02-10 03:09:12,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:12,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:12,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:12,159 INFO L87 Difference]: Start difference. First operand 657 states and 1809 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:12,304 INFO L93 Difference]: Finished difference Result 761 states and 2069 transitions. [2022-02-10 03:09:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:09:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:12,305 INFO L225 Difference]: With dead ends: 761 [2022-02-10 03:09:12,305 INFO L226 Difference]: Without dead ends: 761 [2022-02-10 03:09:12,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:12,306 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:12,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 103 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 305 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-02-10 03:09:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-02-10 03:09:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 656. [2022-02-10 03:09:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.761832061068702) internal successors, (1809), 655 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1809 transitions. [2022-02-10 03:09:12,312 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1809 transitions. Word has length 25 [2022-02-10 03:09:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:12,312 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1809 transitions. [2022-02-10 03:09:12,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1809 transitions. [2022-02-10 03:09:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:12,313 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:12,313 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:12,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-02-10 03:09:12,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-02-10 03:09:12,514 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash -562657341, now seen corresponding path program 275 times [2022-02-10 03:09:12,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:12,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498905699] [2022-02-10 03:09:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:12,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:12,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:12,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498905699] [2022-02-10 03:09:12,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498905699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:12,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062963811] [2022-02-10 03:09:12,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:12,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:12,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:12,605 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:12,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-10 03:09:12,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:09:12,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:12,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:12,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:12,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:12,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:12,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:09:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:12,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:12,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:12,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:09:13,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:13,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:13,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:13,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:13,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062963811] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:13,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:13,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:09:13,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160795563] [2022-02-10 03:09:13,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:13,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:13,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:13,066 INFO L87 Difference]: Start difference. First operand 656 states and 1809 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:13,411 INFO L93 Difference]: Finished difference Result 984 states and 2552 transitions. [2022-02-10 03:09:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:09:13,411 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:13,412 INFO L225 Difference]: With dead ends: 984 [2022-02-10 03:09:13,413 INFO L226 Difference]: Without dead ends: 984 [2022-02-10 03:09:13,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:09:13,413 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 104 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:13,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 168 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-02-10 03:09:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 658. [2022-02-10 03:09:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.767123287671233) internal successors, (1818), 657 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1818 transitions. [2022-02-10 03:09:13,420 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1818 transitions. Word has length 25 [2022-02-10 03:09:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:13,420 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1818 transitions. [2022-02-10 03:09:13,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1818 transitions. [2022-02-10 03:09:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:13,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:13,421 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:13,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-02-10 03:09:13,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:13,622 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:13,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1411465405, now seen corresponding path program 276 times [2022-02-10 03:09:13,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:13,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205877898] [2022-02-10 03:09:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:13,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:13,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:13,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205877898] [2022-02-10 03:09:13,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205877898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:13,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175284516] [2022-02-10 03:09:13,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:13,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:13,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:13,712 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:13,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-10 03:09:13,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:09:13,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:13,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:13,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:14,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:09:14,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:09:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:14,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:14,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:14,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:09:14,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:14,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:14,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:14,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:14,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175284516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:14,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:14,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-10 03:09:14,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848382645] [2022-02-10 03:09:14,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:14,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:09:14,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:09:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:09:14,234 INFO L87 Difference]: Start difference. First operand 658 states and 1818 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:14,355 INFO L93 Difference]: Finished difference Result 987 states and 2583 transitions. [2022-02-10 03:09:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:14,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:14,357 INFO L225 Difference]: With dead ends: 987 [2022-02-10 03:09:14,357 INFO L226 Difference]: Without dead ends: 987 [2022-02-10 03:09:14,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:09:14,357 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:14,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 90 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-02-10 03:09:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-02-10 03:09:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 656. [2022-02-10 03:09:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7770992366412215) internal successors, (1819), 655 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1819 transitions. [2022-02-10 03:09:14,365 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1819 transitions. Word has length 25 [2022-02-10 03:09:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:14,365 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1819 transitions. [2022-02-10 03:09:14,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1819 transitions. [2022-02-10 03:09:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:14,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:14,366 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:14,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-02-10 03:09:14,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:14,566 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:14,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1556674459, now seen corresponding path program 277 times [2022-02-10 03:09:14,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:14,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585022840] [2022-02-10 03:09:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:14,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:14,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:14,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585022840] [2022-02-10 03:09:14,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585022840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:14,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045082157] [2022-02-10 03:09:14,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:14,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:14,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:14,699 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:14,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-10 03:09:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:14,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:14,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:14,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:14,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:14,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:14,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:09:14,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:09:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:14,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:15,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:15,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-02-10 03:09:15,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:15,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:15,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:15,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:09:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:15,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045082157] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:15,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:15,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:15,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365907344] [2022-02-10 03:09:15,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:15,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:15,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:15,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:15,093 INFO L87 Difference]: Start difference. First operand 656 states and 1819 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:15,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:15,240 INFO L93 Difference]: Finished difference Result 749 states and 1985 transitions. [2022-02-10 03:09:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:09:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:15,241 INFO L225 Difference]: With dead ends: 749 [2022-02-10 03:09:15,241 INFO L226 Difference]: Without dead ends: 745 [2022-02-10 03:09:15,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:15,241 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:15,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 106 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 279 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-02-10 03:09:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-02-10 03:09:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 664. [2022-02-10 03:09:15,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.7571644042232277) internal successors, (1828), 663 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1828 transitions. [2022-02-10 03:09:15,250 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1828 transitions. Word has length 25 [2022-02-10 03:09:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:15,251 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1828 transitions. [2022-02-10 03:09:15,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1828 transitions. [2022-02-10 03:09:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:15,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:15,252 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:15,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:15,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:15,467 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:15,467 INFO L85 PathProgramCache]: Analyzing trace with hash 304155655, now seen corresponding path program 278 times [2022-02-10 03:09:15,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:15,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791116998] [2022-02-10 03:09:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:15,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:15,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:15,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791116998] [2022-02-10 03:09:15,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791116998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:15,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154743778] [2022-02-10 03:09:15,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:15,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:15,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:15,596 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:15,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-10 03:09:15,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:15,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:15,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:15,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:15,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:15,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:15,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:09:15,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:09:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:15,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:15,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:15,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:15,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:15,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:15,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:09:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:16,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154743778] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:16,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:16,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:16,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777874614] [2022-02-10 03:09:16,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:16,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:16,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:16,032 INFO L87 Difference]: Start difference. First operand 664 states and 1828 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:16,295 INFO L93 Difference]: Finished difference Result 737 states and 1967 transitions. [2022-02-10 03:09:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:16,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:16,296 INFO L225 Difference]: With dead ends: 737 [2022-02-10 03:09:16,296 INFO L226 Difference]: Without dead ends: 727 [2022-02-10 03:09:16,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:16,297 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:16,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 106 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 316 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-02-10 03:09:16,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-02-10 03:09:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 656. [2022-02-10 03:09:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7755725190839695) internal successors, (1818), 655 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1818 transitions. [2022-02-10 03:09:16,303 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1818 transitions. Word has length 25 [2022-02-10 03:09:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:16,303 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1818 transitions. [2022-02-10 03:09:16,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1818 transitions. [2022-02-10 03:09:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:16,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:16,304 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:16,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-02-10 03:09:16,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2022-02-10 03:09:16,505 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:16,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1690146399, now seen corresponding path program 279 times [2022-02-10 03:09:16,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:16,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330060774] [2022-02-10 03:09:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:16,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:16,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:16,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330060774] [2022-02-10 03:09:16,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330060774] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:16,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043767804] [2022-02-10 03:09:16,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:16,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:16,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:16,595 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:16,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-10 03:09:16,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:16,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:16,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:16,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:16,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:09:16,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:09:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:16,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:16,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:16,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:09:16,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:16,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:16,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:16,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:17,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043767804] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:17,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:17,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-10 03:09:17,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974621292] [2022-02-10 03:09:17,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:17,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:09:17,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:09:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:09:17,024 INFO L87 Difference]: Start difference. First operand 656 states and 1818 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:17,154 INFO L93 Difference]: Finished difference Result 831 states and 2258 transitions. [2022-02-10 03:09:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:17,155 INFO L225 Difference]: With dead ends: 831 [2022-02-10 03:09:17,155 INFO L226 Difference]: Without dead ends: 831 [2022-02-10 03:09:17,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:09:17,155 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:17,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 123 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 286 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-02-10 03:09:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-02-10 03:09:17,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 660. [2022-02-10 03:09:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7814871016691955) internal successors, (1833), 659 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:17,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1833 transitions. [2022-02-10 03:09:17,162 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1833 transitions. Word has length 25 [2022-02-10 03:09:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:17,162 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1833 transitions. [2022-02-10 03:09:17,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1833 transitions. [2022-02-10 03:09:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:17,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:17,163 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:17,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-02-10 03:09:17,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:17,364 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:17,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash 824998945, now seen corresponding path program 280 times [2022-02-10 03:09:17,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:17,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861401414] [2022-02-10 03:09:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:17,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:17,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:17,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861401414] [2022-02-10 03:09:17,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861401414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:17,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909323932] [2022-02-10 03:09:17,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:17,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:17,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:17,460 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:17,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-10 03:09:17,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:17,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:17,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:17,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:17,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:17,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:17,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:09:17,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:09:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:17,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:17,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:17,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:09:17,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:17,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:17,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:17,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:17,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909323932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:17,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:17,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:17,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191945347] [2022-02-10 03:09:17,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:17,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:17,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:17,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:17,964 INFO L87 Difference]: Start difference. First operand 660 states and 1833 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:18,148 INFO L93 Difference]: Finished difference Result 804 states and 2163 transitions. [2022-02-10 03:09:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:09:18,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:18,150 INFO L225 Difference]: With dead ends: 804 [2022-02-10 03:09:18,150 INFO L226 Difference]: Without dead ends: 804 [2022-02-10 03:09:18,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:18,150 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:18,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 114 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 345 Invalid, 0 Unknown, 195 Unchecked, 0.1s Time] [2022-02-10 03:09:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-02-10 03:09:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 662. [2022-02-10 03:09:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.779122541603631) internal successors, (1837), 661 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1837 transitions. [2022-02-10 03:09:18,157 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1837 transitions. Word has length 25 [2022-02-10 03:09:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:18,157 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1837 transitions. [2022-02-10 03:09:18,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1837 transitions. [2022-02-10 03:09:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:18,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:18,158 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:18,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-02-10 03:09:18,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-02-10 03:09:18,358 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:18,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2046437681, now seen corresponding path program 281 times [2022-02-10 03:09:18,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:18,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535353942] [2022-02-10 03:09:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:18,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:18,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:18,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535353942] [2022-02-10 03:09:18,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535353942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:18,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363907167] [2022-02-10 03:09:18,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:18,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:18,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:18,485 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:18,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-10 03:09:18,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:09:18,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:18,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:18,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:09:18,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:18,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:09:18,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:18,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:09:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:18,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:18,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:18,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:18,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:18,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 49 [2022-02-10 03:09:18,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:18,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-02-10 03:09:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:18,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363907167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:18,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:18,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:09:18,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384838083] [2022-02-10 03:09:18,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:18,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:18,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:18,831 INFO L87 Difference]: Start difference. First operand 662 states and 1837 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:19,127 INFO L93 Difference]: Finished difference Result 679 states and 1873 transitions. [2022-02-10 03:09:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:19,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:19,128 INFO L225 Difference]: With dead ends: 679 [2022-02-10 03:09:19,128 INFO L226 Difference]: Without dead ends: 677 [2022-02-10 03:09:19,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:19,128 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:19,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 64 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:09:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-02-10 03:09:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 666. [2022-02-10 03:09:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.768421052631579) internal successors, (1841), 665 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1841 transitions. [2022-02-10 03:09:19,134 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1841 transitions. Word has length 25 [2022-02-10 03:09:19,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:19,134 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1841 transitions. [2022-02-10 03:09:19,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:19,134 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1841 transitions. [2022-02-10 03:09:19,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:19,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:19,135 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:19,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-02-10 03:09:19,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-02-10 03:09:19,336 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1310404893, now seen corresponding path program 282 times [2022-02-10 03:09:19,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:19,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993787561] [2022-02-10 03:09:19,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:19,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:19,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:19,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993787561] [2022-02-10 03:09:19,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993787561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:19,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005331453] [2022-02-10 03:09:19,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:19,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:19,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:19,463 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:19,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-10 03:09:19,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:09:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:19,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:19,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:09:19,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:19,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:09:19,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:19,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:09:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:19,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:19,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:19,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:19,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:19,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 49 [2022-02-10 03:09:19,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:19,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-02-10 03:09:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:19,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005331453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:19,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:19,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:09:19,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992608140] [2022-02-10 03:09:19,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:19,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:09:19,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:09:19,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:09:19,803 INFO L87 Difference]: Start difference. First operand 666 states and 1841 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:20,166 INFO L93 Difference]: Finished difference Result 696 states and 1894 transitions. [2022-02-10 03:09:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:20,167 INFO L225 Difference]: With dead ends: 696 [2022-02-10 03:09:20,168 INFO L226 Difference]: Without dead ends: 692 [2022-02-10 03:09:20,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:20,168 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:20,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 62 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:09:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-02-10 03:09:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 671. [2022-02-10 03:09:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.756716417910448) internal successors, (1847), 670 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1847 transitions. [2022-02-10 03:09:20,174 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1847 transitions. Word has length 25 [2022-02-10 03:09:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:20,174 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1847 transitions. [2022-02-10 03:09:20,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1847 transitions. [2022-02-10 03:09:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:20,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:20,175 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:20,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-02-10 03:09:20,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-02-10 03:09:20,376 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:20,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1123732289, now seen corresponding path program 283 times [2022-02-10 03:09:20,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:20,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457159360] [2022-02-10 03:09:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:20,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:20,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:20,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457159360] [2022-02-10 03:09:20,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457159360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:20,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435134039] [2022-02-10 03:09:20,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:20,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:20,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:20,500 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:20,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-10 03:09:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:20,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:20,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:20,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:09:20,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:20,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:09:20,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:20,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:09:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:20,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:20,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:20,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:20,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:20,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 49 [2022-02-10 03:09:20,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:20,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-02-10 03:09:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:20,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435134039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:20,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:20,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:09:20,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631258256] [2022-02-10 03:09:20,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:20,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:09:20,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:20,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:09:20,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:09:20,826 INFO L87 Difference]: Start difference. First operand 671 states and 1847 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:21,082 INFO L93 Difference]: Finished difference Result 684 states and 1876 transitions. [2022-02-10 03:09:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:21,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:21,084 INFO L225 Difference]: With dead ends: 684 [2022-02-10 03:09:21,084 INFO L226 Difference]: Without dead ends: 673 [2022-02-10 03:09:21,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:21,084 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:21,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 71 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:09:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-02-10 03:09:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 662. [2022-02-10 03:09:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.777609682299546) internal successors, (1836), 661 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1836 transitions. [2022-02-10 03:09:21,090 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1836 transitions. Word has length 25 [2022-02-10 03:09:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:21,090 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1836 transitions. [2022-02-10 03:09:21,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1836 transitions. [2022-02-10 03:09:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:21,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:21,091 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:21,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-02-10 03:09:21,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:21,292 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash -46699373, now seen corresponding path program 284 times [2022-02-10 03:09:21,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:21,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226025001] [2022-02-10 03:09:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:21,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:21,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:21,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226025001] [2022-02-10 03:09:21,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226025001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:21,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136596332] [2022-02-10 03:09:21,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:21,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:21,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:21,384 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:21,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-10 03:09:21,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:21,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:21,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:21,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:21,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:09:21,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:09:21,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:09:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:21,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:21,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:21,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:09:21,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:21,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:21,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:21,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:21,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136596332] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:21,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:21,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-02-10 03:09:21,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968780470] [2022-02-10 03:09:21,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:21,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:09:21,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:09:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:09:21,714 INFO L87 Difference]: Start difference. First operand 662 states and 1836 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:21,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:21,863 INFO L93 Difference]: Finished difference Result 895 states and 2386 transitions. [2022-02-10 03:09:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:21,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:21,865 INFO L225 Difference]: With dead ends: 895 [2022-02-10 03:09:21,865 INFO L226 Difference]: Without dead ends: 895 [2022-02-10 03:09:21,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:09:21,865 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:21,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 95 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:09:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-02-10 03:09:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 650. [2022-02-10 03:09:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.75808936825886) internal successors, (1790), 649 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1790 transitions. [2022-02-10 03:09:21,872 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1790 transitions. Word has length 25 [2022-02-10 03:09:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:21,872 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1790 transitions. [2022-02-10 03:09:21,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1790 transitions. [2022-02-10 03:09:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:21,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:21,873 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:21,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-02-10 03:09:22,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2022-02-10 03:09:22,083 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1588001355, now seen corresponding path program 285 times [2022-02-10 03:09:22,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:22,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489153020] [2022-02-10 03:09:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:22,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:22,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:22,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489153020] [2022-02-10 03:09:22,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489153020] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:22,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649478455] [2022-02-10 03:09:22,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:22,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:22,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:22,180 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:22,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-02-10 03:09:22,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:09:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:22,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:09:22,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:09:22,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:09:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:22,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:22,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:22,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:09:22,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:22,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:22,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:22,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:22,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649478455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:22,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:22,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:09:22,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612825703] [2022-02-10 03:09:22,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:22,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:09:22,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:09:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:09:22,596 INFO L87 Difference]: Start difference. First operand 650 states and 1790 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:22,842 INFO L93 Difference]: Finished difference Result 889 states and 2352 transitions. [2022-02-10 03:09:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:22,843 INFO L225 Difference]: With dead ends: 889 [2022-02-10 03:09:22,843 INFO L226 Difference]: Without dead ends: 889 [2022-02-10 03:09:22,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:22,843 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:22,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 140 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-10 03:09:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 645. [2022-02-10 03:09:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7546583850931676) internal successors, (1774), 644 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1774 transitions. [2022-02-10 03:09:22,851 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1774 transitions. Word has length 25 [2022-02-10 03:09:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:22,851 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1774 transitions. [2022-02-10 03:09:22,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1774 transitions. [2022-02-10 03:09:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:22,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:22,852 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:22,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-02-10 03:09:23,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:23,052 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1229006189, now seen corresponding path program 286 times [2022-02-10 03:09:23,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:23,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298289869] [2022-02-10 03:09:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:23,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:23,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:23,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298289869] [2022-02-10 03:09:23,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298289869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:23,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885128403] [2022-02-10 03:09:23,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:23,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:23,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:23,171 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:23,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-02-10 03:09:23,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:23,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:23,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:23,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:23,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:09:23,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:09:23,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:09:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:23,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:23,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:23,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:23,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:23,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:09:23,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:23,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:09:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:23,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885128403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:23,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:23,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:09:23,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164242178] [2022-02-10 03:09:23,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:23,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:09:23,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:09:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:09:23,567 INFO L87 Difference]: Start difference. First operand 645 states and 1774 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:23,778 INFO L93 Difference]: Finished difference Result 708 states and 1920 transitions. [2022-02-10 03:09:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:23,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:23,779 INFO L225 Difference]: With dead ends: 708 [2022-02-10 03:09:23,779 INFO L226 Difference]: Without dead ends: 708 [2022-02-10 03:09:23,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:23,780 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:23,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 104 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-10 03:09:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 645. [2022-02-10 03:09:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7546583850931676) internal successors, (1774), 644 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1774 transitions. [2022-02-10 03:09:23,786 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1774 transitions. Word has length 25 [2022-02-10 03:09:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:23,786 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1774 transitions. [2022-02-10 03:09:23,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1774 transitions. [2022-02-10 03:09:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:23,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:23,787 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:23,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-02-10 03:09:23,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-02-10 03:09:23,987 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:23,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:23,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1098988021, now seen corresponding path program 287 times [2022-02-10 03:09:23,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:23,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108450822] [2022-02-10 03:09:23,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:23,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:24,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:24,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108450822] [2022-02-10 03:09:24,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108450822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:24,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866393834] [2022-02-10 03:09:24,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:24,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:24,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:24,071 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:24,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-02-10 03:09:24,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:09:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:24,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:24,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:09:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:24,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:24,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:24,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:24,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:24,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:24,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:24,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:24,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866393834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:24,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:24,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:24,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396217174] [2022-02-10 03:09:24,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:24,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:24,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:24,401 INFO L87 Difference]: Start difference. First operand 645 states and 1774 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:24,559 INFO L93 Difference]: Finished difference Result 677 states and 1861 transitions. [2022-02-10 03:09:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:24,560 INFO L225 Difference]: With dead ends: 677 [2022-02-10 03:09:24,560 INFO L226 Difference]: Without dead ends: 677 [2022-02-10 03:09:24,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:24,560 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:24,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 94 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-02-10 03:09:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 646. [2022-02-10 03:09:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.7550387596899224) internal successors, (1777), 645 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1777 transitions. [2022-02-10 03:09:24,567 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1777 transitions. Word has length 25 [2022-02-10 03:09:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:24,567 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1777 transitions. [2022-02-10 03:09:24,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1777 transitions. [2022-02-10 03:09:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:24,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:24,568 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:24,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-02-10 03:09:24,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:24,768 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1394249751, now seen corresponding path program 288 times [2022-02-10 03:09:24,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:24,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754569767] [2022-02-10 03:09:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:24,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:24,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:24,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754569767] [2022-02-10 03:09:24,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754569767] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:24,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267636381] [2022-02-10 03:09:24,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:24,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:24,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:24,872 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:24,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-02-10 03:09:24,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:09:24,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:24,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:24,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:25,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:25,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:25,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:25,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:25,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:25,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:09:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:25,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:25,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:25,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:25,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:25,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:25,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:25,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:25,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267636381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:25,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:25,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:25,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369088936] [2022-02-10 03:09:25,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:25,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:25,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:25,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:25,311 INFO L87 Difference]: Start difference. First operand 646 states and 1777 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:25,453 INFO L93 Difference]: Finished difference Result 703 states and 1904 transitions. [2022-02-10 03:09:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:25,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:25,454 INFO L225 Difference]: With dead ends: 703 [2022-02-10 03:09:25,454 INFO L226 Difference]: Without dead ends: 703 [2022-02-10 03:09:25,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:09:25,454 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:25,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 135 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 261 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-02-10 03:09:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-02-10 03:09:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 646. [2022-02-10 03:09:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.7550387596899224) internal successors, (1777), 645 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1777 transitions. [2022-02-10 03:09:25,461 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1777 transitions. Word has length 25 [2022-02-10 03:09:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:25,461 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1777 transitions. [2022-02-10 03:09:25,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1777 transitions. [2022-02-10 03:09:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:25,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:25,461 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:25,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-02-10 03:09:25,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable295 [2022-02-10 03:09:25,662 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:25,662 INFO L85 PathProgramCache]: Analyzing trace with hash -664964973, now seen corresponding path program 289 times [2022-02-10 03:09:25,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:25,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850623937] [2022-02-10 03:09:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:25,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:25,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:25,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850623937] [2022-02-10 03:09:25,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850623937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:25,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396209591] [2022-02-10 03:09:25,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:25,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:25,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:25,769 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:25,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-02-10 03:09:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:25,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:25,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:09:25,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-02-10 03:09:25,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-02-10 03:09:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:26,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:26,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:26,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:26,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:26,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:26,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:26,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:26,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396209591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:26,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:26,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:09:26,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051312373] [2022-02-10 03:09:26,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:26,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:26,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:26,208 INFO L87 Difference]: Start difference. First operand 646 states and 1777 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:26,383 INFO L93 Difference]: Finished difference Result 708 states and 1915 transitions. [2022-02-10 03:09:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:26,384 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:26,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:26,385 INFO L225 Difference]: With dead ends: 708 [2022-02-10 03:09:26,385 INFO L226 Difference]: Without dead ends: 708 [2022-02-10 03:09:26,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:26,385 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:26,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 118 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-10 03:09:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 645. [2022-02-10 03:09:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7546583850931676) internal successors, (1774), 644 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1774 transitions. [2022-02-10 03:09:26,392 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1774 transitions. Word has length 25 [2022-02-10 03:09:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:26,392 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1774 transitions. [2022-02-10 03:09:26,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1774 transitions. [2022-02-10 03:09:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:26,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:26,393 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:26,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-02-10 03:09:26,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:26,593 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:26,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:26,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1420386051, now seen corresponding path program 290 times [2022-02-10 03:09:26,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:26,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020580237] [2022-02-10 03:09:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:26,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:26,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:26,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020580237] [2022-02-10 03:09:26,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020580237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:26,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117457891] [2022-02-10 03:09:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:26,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:26,679 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:26,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-02-10 03:09:26,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:26,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:26,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:26,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:26,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:26,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:26,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:09:27,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:27,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:27,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:27,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:27,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117457891] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:27,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:27,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:09:27,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426127185] [2022-02-10 03:09:27,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:27,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:27,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:27,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:27,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:27,057 INFO L87 Difference]: Start difference. First operand 645 states and 1774 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:27,277 INFO L93 Difference]: Finished difference Result 704 states and 1935 transitions. [2022-02-10 03:09:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:27,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:27,278 INFO L225 Difference]: With dead ends: 704 [2022-02-10 03:09:27,278 INFO L226 Difference]: Without dead ends: 704 [2022-02-10 03:09:27,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:27,278 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:27,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 110 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-02-10 03:09:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 645. [2022-02-10 03:09:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7546583850931676) internal successors, (1774), 644 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1774 transitions. [2022-02-10 03:09:27,285 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1774 transitions. Word has length 25 [2022-02-10 03:09:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:27,285 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1774 transitions. [2022-02-10 03:09:27,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1774 transitions. [2022-02-10 03:09:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:27,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:27,286 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:27,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-02-10 03:09:27,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:27,486 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:27,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1715647781, now seen corresponding path program 291 times [2022-02-10 03:09:27,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:27,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496701761] [2022-02-10 03:09:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:27,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:27,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:27,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496701761] [2022-02-10 03:09:27,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496701761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:27,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771350489] [2022-02-10 03:09:27,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:27,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:27,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:27,596 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:27,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-02-10 03:09:27,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:27,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:27,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:27,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:27,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:27,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:27,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:27,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:09:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:27,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:28,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:28,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:28,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:28,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:28,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:28,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:28,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771350489] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:28,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:28,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:28,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359289016] [2022-02-10 03:09:28,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:28,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:28,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:28,116 INFO L87 Difference]: Start difference. First operand 645 states and 1774 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:28,290 INFO L93 Difference]: Finished difference Result 701 states and 1898 transitions. [2022-02-10 03:09:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:28,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:28,291 INFO L225 Difference]: With dead ends: 701 [2022-02-10 03:09:28,291 INFO L226 Difference]: Without dead ends: 701 [2022-02-10 03:09:28,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:28,291 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:28,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 128 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 354 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-02-10 03:09:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-02-10 03:09:28,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 645. [2022-02-10 03:09:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7546583850931676) internal successors, (1774), 644 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1774 transitions. [2022-02-10 03:09:28,298 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1774 transitions. Word has length 25 [2022-02-10 03:09:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:28,298 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1774 transitions. [2022-02-10 03:09:28,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:28,298 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1774 transitions. [2022-02-10 03:09:28,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:28,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:28,299 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:28,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-02-10 03:09:28,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-02-10 03:09:28,499 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash 190121875, now seen corresponding path program 292 times [2022-02-10 03:09:28,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:28,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238253077] [2022-02-10 03:09:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:28,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:28,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:28,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238253077] [2022-02-10 03:09:28,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238253077] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:28,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248908180] [2022-02-10 03:09:28,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:28,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:28,616 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:28,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-02-10 03:09:28,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:28,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:28,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:28,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:28,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:28,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:28,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:28,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:09:28,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:28,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:09:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:28,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:29,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:29,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:09:29,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:29,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:29,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:29,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:29,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248908180] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:29,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:29,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:29,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16661507] [2022-02-10 03:09:29,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:29,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:29,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:29,152 INFO L87 Difference]: Start difference. First operand 645 states and 1774 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:29,286 INFO L93 Difference]: Finished difference Result 686 states and 1888 transitions. [2022-02-10 03:09:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:29,287 INFO L225 Difference]: With dead ends: 686 [2022-02-10 03:09:29,287 INFO L226 Difference]: Without dead ends: 686 [2022-02-10 03:09:29,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:09:29,287 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:29,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 79 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-02-10 03:09:29,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-02-10 03:09:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 639. [2022-02-10 03:09:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.7554858934169277) internal successors, (1758), 638 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1758 transitions. [2022-02-10 03:09:29,293 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1758 transitions. Word has length 25 [2022-02-10 03:09:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:29,294 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1758 transitions. [2022-02-10 03:09:29,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1758 transitions. [2022-02-10 03:09:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:29,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:29,294 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:29,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-02-10 03:09:29,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:29,495 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash -326914209, now seen corresponding path program 293 times [2022-02-10 03:09:29,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:29,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034665694] [2022-02-10 03:09:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:29,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:29,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:29,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034665694] [2022-02-10 03:09:29,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034665694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:29,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981829203] [2022-02-10 03:09:29,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:29,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:29,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:29,600 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:29,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-02-10 03:09:29,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:09:29,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:29,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:29,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:29,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:29,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:29,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:29,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:29,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:29,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:29,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:30,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:30,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:30,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:30,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:30,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:30,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:30,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981829203] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:30,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:30,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:30,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336851720] [2022-02-10 03:09:30,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:30,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:30,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:30,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:30,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:30,138 INFO L87 Difference]: Start difference. First operand 639 states and 1758 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:30,370 INFO L93 Difference]: Finished difference Result 716 states and 1923 transitions. [2022-02-10 03:09:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:30,371 INFO L225 Difference]: With dead ends: 716 [2022-02-10 03:09:30,371 INFO L226 Difference]: Without dead ends: 700 [2022-02-10 03:09:30,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:30,371 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:30,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 150 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 353 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-02-10 03:09:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-02-10 03:09:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 638. [2022-02-10 03:09:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7551020408163267) internal successors, (1755), 637 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1755 transitions. [2022-02-10 03:09:30,378 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1755 transitions. Word has length 25 [2022-02-10 03:09:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:30,378 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1755 transitions. [2022-02-10 03:09:30,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1755 transitions. [2022-02-10 03:09:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:30,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:30,379 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:30,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:30,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-02-10 03:09:30,579 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash 146628635, now seen corresponding path program 294 times [2022-02-10 03:09:30,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:30,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680866367] [2022-02-10 03:09:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:30,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:30,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:30,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680866367] [2022-02-10 03:09:30,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680866367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:30,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567485696] [2022-02-10 03:09:30,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:30,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:30,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:30,723 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:30,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-02-10 03:09:30,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:09:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:30,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:30,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:30,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:31,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:09:31,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:31,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:09:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:31,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:31,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:31,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:31,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:31,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:31,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:31,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:31,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567485696] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:31,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:31,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:31,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774499219] [2022-02-10 03:09:31,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:31,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:31,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:31,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:31,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:31,761 INFO L87 Difference]: Start difference. First operand 638 states and 1755 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:31,990 INFO L93 Difference]: Finished difference Result 695 states and 1883 transitions. [2022-02-10 03:09:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:31,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:31,992 INFO L225 Difference]: With dead ends: 695 [2022-02-10 03:09:31,992 INFO L226 Difference]: Without dead ends: 695 [2022-02-10 03:09:31,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:09:31,992 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:31,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 110 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 296 Invalid, 0 Unknown, 148 Unchecked, 0.1s Time] [2022-02-10 03:09:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-02-10 03:09:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 639. [2022-02-10 03:09:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.75705329153605) internal successors, (1759), 638 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1759 transitions. [2022-02-10 03:09:31,998 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1759 transitions. Word has length 25 [2022-02-10 03:09:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:31,998 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1759 transitions. [2022-02-10 03:09:31,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1759 transitions. [2022-02-10 03:09:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:31,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:31,999 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:32,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-02-10 03:09:32,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-02-10 03:09:32,200 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash 551902953, now seen corresponding path program 295 times [2022-02-10 03:09:32,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:32,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421612202] [2022-02-10 03:09:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:32,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:32,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:32,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421612202] [2022-02-10 03:09:32,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421612202] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:32,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083630085] [2022-02-10 03:09:32,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:32,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:32,346 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:32,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-02-10 03:09:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:32,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:32,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:32,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:32,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:32,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:32,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2022-02-10 03:09:32,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:32,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-02-10 03:09:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:32,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:32,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:32,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:32,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:32,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:32,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:32,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:32,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083630085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:32,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:32,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:32,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664626384] [2022-02-10 03:09:32,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:32,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:32,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:32,985 INFO L87 Difference]: Start difference. First operand 639 states and 1759 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:33,087 INFO L93 Difference]: Finished difference Result 672 states and 1850 transitions. [2022-02-10 03:09:33,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:33,089 INFO L225 Difference]: With dead ends: 672 [2022-02-10 03:09:33,089 INFO L226 Difference]: Without dead ends: 672 [2022-02-10 03:09:33,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:33,089 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:33,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 277 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-02-10 03:09:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-02-10 03:09:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 640. [2022-02-10 03:09:33,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.758998435054773) internal successors, (1763), 639 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1763 transitions. [2022-02-10 03:09:33,095 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1763 transitions. Word has length 25 [2022-02-10 03:09:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:33,095 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1763 transitions. [2022-02-10 03:09:33,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1763 transitions. [2022-02-10 03:09:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:33,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:33,096 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:33,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-02-10 03:09:33,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:33,296 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1534807643, now seen corresponding path program 296 times [2022-02-10 03:09:33,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:33,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063879592] [2022-02-10 03:09:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:33,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:33,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:33,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063879592] [2022-02-10 03:09:33,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063879592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:33,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609402178] [2022-02-10 03:09:33,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:33,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:33,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:33,452 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:33,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-02-10 03:09:33,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:33,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:33,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:33,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:33,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:33,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:34,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:34,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:34,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:34,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:34,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:34,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:34,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:34,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:34,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:34,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:34,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:34,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609402178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:34,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:34,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:34,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990382761] [2022-02-10 03:09:34,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:34,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:34,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:34,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:34,398 INFO L87 Difference]: Start difference. First operand 640 states and 1763 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:34,754 INFO L93 Difference]: Finished difference Result 752 states and 1991 transitions. [2022-02-10 03:09:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:09:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:34,756 INFO L225 Difference]: With dead ends: 752 [2022-02-10 03:09:34,756 INFO L226 Difference]: Without dead ends: 752 [2022-02-10 03:09:34,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:09:34,756 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:34,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 141 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 461 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-02-10 03:09:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-10 03:09:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 644. [2022-02-10 03:09:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.7682737169517884) internal successors, (1780), 643 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1780 transitions. [2022-02-10 03:09:34,763 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1780 transitions. Word has length 25 [2022-02-10 03:09:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:34,763 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1780 transitions. [2022-02-10 03:09:34,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1780 transitions. [2022-02-10 03:09:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:34,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:34,764 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:34,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:34,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:34,964 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash 404369679, now seen corresponding path program 297 times [2022-02-10 03:09:34,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:34,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001724770] [2022-02-10 03:09:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:34,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:35,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:35,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001724770] [2022-02-10 03:09:35,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001724770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:35,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838405548] [2022-02-10 03:09:35,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:35,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:35,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:35,102 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:35,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-02-10 03:09:35,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:09:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:35,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:09:35,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:35,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:35,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:35,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:35,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:35,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:35,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:35,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:35,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:36,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:36,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:36,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:36,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:36,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:36,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838405548] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:36,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:36,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 23 [2022-02-10 03:09:36,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253141896] [2022-02-10 03:09:36,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:36,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:09:36,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:36,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:09:36,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:36,120 INFO L87 Difference]: Start difference. First operand 644 states and 1780 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:36,426 INFO L93 Difference]: Finished difference Result 704 states and 1894 transitions. [2022-02-10 03:09:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:09:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:36,427 INFO L225 Difference]: With dead ends: 704 [2022-02-10 03:09:36,427 INFO L226 Difference]: Without dead ends: 696 [2022-02-10 03:09:36,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:09:36,428 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:36,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 194 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 551 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-02-10 03:09:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-02-10 03:09:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 638. [2022-02-10 03:09:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7551020408163267) internal successors, (1755), 637 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1755 transitions. [2022-02-10 03:09:36,434 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1755 transitions. Word has length 25 [2022-02-10 03:09:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:36,434 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1755 transitions. [2022-02-10 03:09:36,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1755 transitions. [2022-02-10 03:09:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:36,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:36,435 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:36,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-02-10 03:09:36,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:36,635 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1405665905, now seen corresponding path program 298 times [2022-02-10 03:09:36,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:36,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844404625] [2022-02-10 03:09:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:36,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:36,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:36,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844404625] [2022-02-10 03:09:36,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844404625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:36,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466476210] [2022-02-10 03:09:36,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:36,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:36,785 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:36,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-02-10 03:09:36,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:36,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:36,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:36,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:36,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:36,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:37,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:37,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:37,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:37,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:37,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:37,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:37,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:37,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:37,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:37,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:37,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:09:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:37,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466476210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:37,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:37,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:37,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803931537] [2022-02-10 03:09:37,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:37,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:37,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:37,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:37,607 INFO L87 Difference]: Start difference. First operand 638 states and 1755 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:37,888 INFO L93 Difference]: Finished difference Result 702 states and 1901 transitions. [2022-02-10 03:09:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:37,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:37,890 INFO L225 Difference]: With dead ends: 702 [2022-02-10 03:09:37,890 INFO L226 Difference]: Without dead ends: 702 [2022-02-10 03:09:37,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:37,890 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:37,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 479 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-02-10 03:09:37,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-02-10 03:09:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 642. [2022-02-10 03:09:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.7628705148205928) internal successors, (1771), 641 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1771 transitions. [2022-02-10 03:09:37,907 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1771 transitions. Word has length 25 [2022-02-10 03:09:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:37,907 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1771 transitions. [2022-02-10 03:09:37,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1771 transitions. [2022-02-10 03:09:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:37,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:37,908 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:37,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-02-10 03:09:38,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:38,109 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash 806077429, now seen corresponding path program 299 times [2022-02-10 03:09:38,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:38,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225521895] [2022-02-10 03:09:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:38,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:38,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:38,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225521895] [2022-02-10 03:09:38,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225521895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:38,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535796774] [2022-02-10 03:09:38,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:38,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:38,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:38,234 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:38,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-02-10 03:09:38,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:09:38,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:38,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:38,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:38,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:38,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:38,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:38,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:38,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:38,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:38,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:39,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:39,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:39,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:39,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:39,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535796774] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:39,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:39,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:39,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796294878] [2022-02-10 03:09:39,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:39,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:39,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:39,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:39,084 INFO L87 Difference]: Start difference. First operand 642 states and 1771 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:39,366 INFO L93 Difference]: Finished difference Result 673 states and 1849 transitions. [2022-02-10 03:09:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:39,367 INFO L225 Difference]: With dead ends: 673 [2022-02-10 03:09:39,368 INFO L226 Difference]: Without dead ends: 669 [2022-02-10 03:09:39,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:39,368 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:39,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 84 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 322 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-02-10 03:09:39,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-10 03:09:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 642. [2022-02-10 03:09:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.7613104524180967) internal successors, (1770), 641 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1770 transitions. [2022-02-10 03:09:39,377 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1770 transitions. Word has length 25 [2022-02-10 03:09:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:39,377 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1770 transitions. [2022-02-10 03:09:39,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1770 transitions. [2022-02-10 03:09:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:39,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:39,378 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:39,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-02-10 03:09:39,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:39,587 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:39,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1700927635, now seen corresponding path program 300 times [2022-02-10 03:09:39,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:39,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139538833] [2022-02-10 03:09:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:39,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:39,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:39,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139538833] [2022-02-10 03:09:39,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139538833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:39,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230480626] [2022-02-10 03:09:39,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:39,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:39,728 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:39,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-02-10 03:09:39,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 03:09:39,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:39,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:39,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:39,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:40,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:40,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:40,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:40,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:40,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:40,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:40,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:40,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:40,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:40,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:40,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:09:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:40,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230480626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:40,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:40,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:40,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546089356] [2022-02-10 03:09:40,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:40,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:40,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:40,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:40,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:40,503 INFO L87 Difference]: Start difference. First operand 642 states and 1770 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:40,782 INFO L93 Difference]: Finished difference Result 697 states and 1904 transitions. [2022-02-10 03:09:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:40,783 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:40,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:40,784 INFO L225 Difference]: With dead ends: 697 [2022-02-10 03:09:40,784 INFO L226 Difference]: Without dead ends: 697 [2022-02-10 03:09:40,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:09:40,784 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:40,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 117 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 414 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-02-10 03:09:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-02-10 03:09:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 639. [2022-02-10 03:09:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.75705329153605) internal successors, (1759), 638 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1759 transitions. [2022-02-10 03:09:40,801 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1759 transitions. Word has length 25 [2022-02-10 03:09:40,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:40,801 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1759 transitions. [2022-02-10 03:09:40,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1759 transitions. [2022-02-10 03:09:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:40,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:40,802 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:40,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:41,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:41,003 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:41,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1311386357, now seen corresponding path program 301 times [2022-02-10 03:09:41,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:41,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901410477] [2022-02-10 03:09:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:41,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:41,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:41,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901410477] [2022-02-10 03:09:41,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901410477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:41,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218402613] [2022-02-10 03:09:41,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:41,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:41,164 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:41,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-02-10 03:09:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:41,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:41,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:41,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:41,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:41,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:41,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:09:41,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:41,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:09:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:41,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:41,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:41,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-10 03:09:41,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:41,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:41,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:41,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:41,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218402613] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:41,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:41,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:09:41,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920854169] [2022-02-10 03:09:41,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:41,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:41,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:41,805 INFO L87 Difference]: Start difference. First operand 639 states and 1759 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:41,935 INFO L93 Difference]: Finished difference Result 661 states and 1809 transitions. [2022-02-10 03:09:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:41,937 INFO L225 Difference]: With dead ends: 661 [2022-02-10 03:09:41,937 INFO L226 Difference]: Without dead ends: 653 [2022-02-10 03:09:41,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:41,937 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:41,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 87 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-02-10 03:09:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-02-10 03:09:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 639. [2022-02-10 03:09:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.7554858934169277) internal successors, (1758), 638 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1758 transitions. [2022-02-10 03:09:41,943 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1758 transitions. Word has length 25 [2022-02-10 03:09:41,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:41,943 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1758 transitions. [2022-02-10 03:09:41,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:41,943 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1758 transitions. [2022-02-10 03:09:41,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:41,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:41,944 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:41,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:42,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2022-02-10 03:09:42,145 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:42,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:42,145 INFO L85 PathProgramCache]: Analyzing trace with hash -971642857, now seen corresponding path program 302 times [2022-02-10 03:09:42,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:42,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892043772] [2022-02-10 03:09:42,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:42,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:42,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:42,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892043772] [2022-02-10 03:09:42,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892043772] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:42,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841369637] [2022-02-10 03:09:42,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:42,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:42,298 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:42,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-02-10 03:09:42,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:42,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:42,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:42,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:42,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:09:42,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:42,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:09:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:42,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:43,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:43,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:09:43,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:43,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:43,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:43,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:09:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:43,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841369637] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:43,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:43,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:43,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023307587] [2022-02-10 03:09:43,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:43,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:43,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:43,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:43,137 INFO L87 Difference]: Start difference. First operand 639 states and 1758 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:43,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:43,437 INFO L93 Difference]: Finished difference Result 697 states and 1897 transitions. [2022-02-10 03:09:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:43,438 INFO L225 Difference]: With dead ends: 697 [2022-02-10 03:09:43,439 INFO L226 Difference]: Without dead ends: 697 [2022-02-10 03:09:43,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:09:43,439 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:43,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 142 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 332 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2022-02-10 03:09:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-02-10 03:09:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 639. [2022-02-10 03:09:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.7554858934169277) internal successors, (1758), 638 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:43,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1758 transitions. [2022-02-10 03:09:43,448 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1758 transitions. Word has length 25 [2022-02-10 03:09:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:43,449 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1758 transitions. [2022-02-10 03:09:43,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1758 transitions. [2022-02-10 03:09:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:43,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:43,450 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:43,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:43,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:43,667 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:43,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1501176907, now seen corresponding path program 303 times [2022-02-10 03:09:43,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:43,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929857219] [2022-02-10 03:09:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:43,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:43,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:43,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929857219] [2022-02-10 03:09:43,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929857219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:43,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628562365] [2022-02-10 03:09:43,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:43,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:43,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:43,756 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:43,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-02-10 03:09:43,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:09:43,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:43,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:43,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:43,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:44,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:44,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:09:44,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:44,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:44,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:44,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:44,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628562365] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:44,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:44,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:09:44,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870635996] [2022-02-10 03:09:44,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:44,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:44,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:44,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:44,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:44,152 INFO L87 Difference]: Start difference. First operand 639 states and 1758 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:44,328 INFO L93 Difference]: Finished difference Result 680 states and 1869 transitions. [2022-02-10 03:09:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:09:44,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:44,329 INFO L225 Difference]: With dead ends: 680 [2022-02-10 03:09:44,329 INFO L226 Difference]: Without dead ends: 680 [2022-02-10 03:09:44,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:44,329 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:44,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 78 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:09:44,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-02-10 03:09:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 643. [2022-02-10 03:09:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.7585669781931466) internal successors, (1771), 642 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1771 transitions. [2022-02-10 03:09:44,336 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1771 transitions. Word has length 25 [2022-02-10 03:09:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:44,336 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1771 transitions. [2022-02-10 03:09:44,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1771 transitions. [2022-02-10 03:09:44,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:44,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:44,337 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:44,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-02-10 03:09:44,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-02-10 03:09:44,537 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:44,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1205915177, now seen corresponding path program 304 times [2022-02-10 03:09:44,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:44,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409168989] [2022-02-10 03:09:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:44,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:44,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:44,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409168989] [2022-02-10 03:09:44,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409168989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:44,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61573923] [2022-02-10 03:09:44,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:44,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:44,652 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:44,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-02-10 03:09:44,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:44,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:44,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:44,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:44,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:44,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:44,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:44,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:44,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:09:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:44,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:45,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:45,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:09:45,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:45,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:45,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:45,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:45,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61573923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:45,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:45,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:45,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907149060] [2022-02-10 03:09:45,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:45,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:45,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:45,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:45,183 INFO L87 Difference]: Start difference. First operand 643 states and 1771 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:45,599 INFO L93 Difference]: Finished difference Result 785 states and 2064 transitions. [2022-02-10 03:09:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:09:45,599 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:45,600 INFO L225 Difference]: With dead ends: 785 [2022-02-10 03:09:45,600 INFO L226 Difference]: Without dead ends: 785 [2022-02-10 03:09:45,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:09:45,600 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 182 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:45,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 171 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 535 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-02-10 03:09:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-02-10 03:09:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 651. [2022-02-10 03:09:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.766153846153846) internal successors, (1798), 650 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1798 transitions. [2022-02-10 03:09:45,607 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1798 transitions. Word has length 25 [2022-02-10 03:09:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:45,607 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 1798 transitions. [2022-02-10 03:09:45,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1798 transitions. [2022-02-10 03:09:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:45,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:45,608 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:45,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-02-10 03:09:45,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-02-10 03:09:45,809 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1183282463, now seen corresponding path program 305 times [2022-02-10 03:09:45,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:45,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865819544] [2022-02-10 03:09:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:45,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:45,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:45,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865819544] [2022-02-10 03:09:45,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865819544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:45,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872362249] [2022-02-10 03:09:45,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:45,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:45,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:45,917 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:45,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-02-10 03:09:45,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:09:45,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:45,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:45,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:46,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:46,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:46,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:46,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:09:46,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:46,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-02-10 03:09:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:46,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:46,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:46,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:46,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:46,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:46,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:46,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:46,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872362249] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:46,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:46,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:46,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785694353] [2022-02-10 03:09:46,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:46,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:46,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:46,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:46,457 INFO L87 Difference]: Start difference. First operand 651 states and 1798 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:46,652 INFO L93 Difference]: Finished difference Result 688 states and 1894 transitions. [2022-02-10 03:09:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:09:46,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:46,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:46,654 INFO L225 Difference]: With dead ends: 688 [2022-02-10 03:09:46,654 INFO L226 Difference]: Without dead ends: 688 [2022-02-10 03:09:46,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:09:46,654 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:46,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 92 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 273 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2022-02-10 03:09:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-02-10 03:09:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 648. [2022-02-10 03:09:46,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7619783616692426) internal successors, (1787), 647 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1787 transitions. [2022-02-10 03:09:46,660 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1787 transitions. Word has length 25 [2022-02-10 03:09:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:46,661 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1787 transitions. [2022-02-10 03:09:46,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1787 transitions. [2022-02-10 03:09:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:46,661 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:46,661 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:46,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-02-10 03:09:46,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-02-10 03:09:46,862 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1538847259, now seen corresponding path program 306 times [2022-02-10 03:09:46,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:46,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391505026] [2022-02-10 03:09:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:46,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:46,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:46,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391505026] [2022-02-10 03:09:46,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391505026] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:46,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817777125] [2022-02-10 03:09:46,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:46,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:46,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:46,950 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:46,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-02-10 03:09:46,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:09:46,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:47,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:47,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:09:47,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:09:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:47,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:47,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:47,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:47,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:47,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:47,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:47,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:47,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817777125] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:47,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:47,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:09:47,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943773014] [2022-02-10 03:09:47,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:47,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:47,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:47,381 INFO L87 Difference]: Start difference. First operand 648 states and 1787 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:47,612 INFO L93 Difference]: Finished difference Result 724 states and 1957 transitions. [2022-02-10 03:09:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:09:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:47,613 INFO L225 Difference]: With dead ends: 724 [2022-02-10 03:09:47,613 INFO L226 Difference]: Without dead ends: 710 [2022-02-10 03:09:47,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:47,613 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:47,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 146 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-02-10 03:09:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 665. [2022-02-10 03:09:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.769578313253012) internal successors, (1839), 664 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1839 transitions. [2022-02-10 03:09:47,620 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1839 transitions. Word has length 25 [2022-02-10 03:09:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:47,620 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1839 transitions. [2022-02-10 03:09:47,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1839 transitions. [2022-02-10 03:09:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:47,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:47,621 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:47,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-02-10 03:09:47,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-02-10 03:09:47,821 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:47,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:47,822 INFO L85 PathProgramCache]: Analyzing trace with hash 946084453, now seen corresponding path program 307 times [2022-02-10 03:09:47,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:47,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860139066] [2022-02-10 03:09:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:47,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:47,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:47,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860139066] [2022-02-10 03:09:47,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860139066] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:47,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485600013] [2022-02-10 03:09:47,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:47,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:47,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:47,960 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:47,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-02-10 03:09:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:47,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:48,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:48,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:48,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:48,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:09:48,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:09:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:48,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:48,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:48,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:48,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:48,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:48,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:48,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:48,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485600013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:48,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:48,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:09:48,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059032881] [2022-02-10 03:09:48,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:48,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:48,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:48,612 INFO L87 Difference]: Start difference. First operand 665 states and 1839 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:48,711 INFO L93 Difference]: Finished difference Result 697 states and 1915 transitions. [2022-02-10 03:09:48,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:48,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:48,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:48,713 INFO L225 Difference]: With dead ends: 697 [2022-02-10 03:09:48,713 INFO L226 Difference]: Without dead ends: 697 [2022-02-10 03:09:48,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:48,713 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:48,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 82 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 259 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-02-10 03:09:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-02-10 03:09:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 665. [2022-02-10 03:09:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.769578313253012) internal successors, (1839), 664 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1839 transitions. [2022-02-10 03:09:48,719 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1839 transitions. Word has length 25 [2022-02-10 03:09:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:48,720 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1839 transitions. [2022-02-10 03:09:48,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1839 transitions. [2022-02-10 03:09:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:48,720 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:48,720 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:48,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-02-10 03:09:48,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:48,921 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash -704719511, now seen corresponding path program 308 times [2022-02-10 03:09:48,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:48,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29925649] [2022-02-10 03:09:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:48,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:49,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:49,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29925649] [2022-02-10 03:09:49,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29925649] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:49,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323239283] [2022-02-10 03:09:49,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:49,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:49,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:49,043 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:49,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-02-10 03:09:49,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:49,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:49,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:49,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:49,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:49,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:49,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:49,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:09:49,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:49,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:09:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:49,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:49,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:49,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:49,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:49,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:49,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:49,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:49,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323239283] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:49,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:49,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:49,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721570231] [2022-02-10 03:09:49,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:49,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:49,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:49,626 INFO L87 Difference]: Start difference. First operand 665 states and 1839 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:49,873 INFO L93 Difference]: Finished difference Result 701 states and 1927 transitions. [2022-02-10 03:09:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:09:49,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:49,874 INFO L225 Difference]: With dead ends: 701 [2022-02-10 03:09:49,874 INFO L226 Difference]: Without dead ends: 701 [2022-02-10 03:09:49,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:09:49,874 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:49,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 138 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 522 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-02-10 03:09:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-02-10 03:09:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 649. [2022-02-10 03:09:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.7685185185185186) internal successors, (1794), 648 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1794 transitions. [2022-02-10 03:09:49,881 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1794 transitions. Word has length 25 [2022-02-10 03:09:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:49,881 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1794 transitions. [2022-02-10 03:09:49,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1794 transitions. [2022-02-10 03:09:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:49,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:49,882 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:49,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:50,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:50,082 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:50,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1700318547, now seen corresponding path program 309 times [2022-02-10 03:09:50,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:50,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452871924] [2022-02-10 03:09:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:50,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:50,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:50,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452871924] [2022-02-10 03:09:50,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452871924] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:50,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539410076] [2022-02-10 03:09:50,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:50,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:50,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:50,181 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:50,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-02-10 03:09:50,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:09:50,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:50,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:50,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:50,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:50,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:50,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:50,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:50,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:09:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:50,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:50,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:50,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:50,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:50,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:50,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:50,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:50,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539410076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:50,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:50,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:50,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617146404] [2022-02-10 03:09:50,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:50,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:50,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:50,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:50,638 INFO L87 Difference]: Start difference. First operand 649 states and 1794 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:50,895 INFO L93 Difference]: Finished difference Result 725 states and 1955 transitions. [2022-02-10 03:09:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:09:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:50,896 INFO L225 Difference]: With dead ends: 725 [2022-02-10 03:09:50,896 INFO L226 Difference]: Without dead ends: 709 [2022-02-10 03:09:50,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:09:50,897 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:50,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 96 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 266 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-02-10 03:09:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-02-10 03:09:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 648. [2022-02-10 03:09:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7604327666151467) internal successors, (1786), 647 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1786 transitions. [2022-02-10 03:09:50,903 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1786 transitions. Word has length 25 [2022-02-10 03:09:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:50,903 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1786 transitions. [2022-02-10 03:09:50,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1786 transitions. [2022-02-10 03:09:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:50,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:50,904 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:50,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-02-10 03:09:51,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-02-10 03:09:51,105 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2022271141, now seen corresponding path program 310 times [2022-02-10 03:09:51,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:51,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998062009] [2022-02-10 03:09:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:51,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:51,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:51,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998062009] [2022-02-10 03:09:51,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998062009] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:51,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373595534] [2022-02-10 03:09:51,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:51,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:51,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:51,199 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:51,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-02-10 03:09:51,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:51,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:51,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:51,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:09:51,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-02-10 03:09:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:51,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:51,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:51,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:51,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:51,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:51,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:51,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:51,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373595534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:51,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:51,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:09:51,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912235869] [2022-02-10 03:09:51,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:51,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:51,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:51,612 INFO L87 Difference]: Start difference. First operand 648 states and 1786 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:51,968 INFO L93 Difference]: Finished difference Result 743 states and 1972 transitions. [2022-02-10 03:09:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:09:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:51,969 INFO L225 Difference]: With dead ends: 743 [2022-02-10 03:09:51,969 INFO L226 Difference]: Without dead ends: 743 [2022-02-10 03:09:51,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:09:51,969 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:51,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 174 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:09:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-02-10 03:09:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 648. [2022-02-10 03:09:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7604327666151467) internal successors, (1786), 647 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1786 transitions. [2022-02-10 03:09:51,976 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1786 transitions. Word has length 25 [2022-02-10 03:09:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:51,976 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1786 transitions. [2022-02-10 03:09:51,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1786 transitions. [2022-02-10 03:09:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:51,977 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:51,977 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:51,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-02-10 03:09:52,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2022-02-10 03:09:52,178 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:52,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1142258191, now seen corresponding path program 311 times [2022-02-10 03:09:52,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:52,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475794204] [2022-02-10 03:09:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:52,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:52,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:52,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475794204] [2022-02-10 03:09:52,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475794204] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:52,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348835913] [2022-02-10 03:09:52,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:52,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:52,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:52,281 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:52,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-02-10 03:09:52,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:09:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:52,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:52,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:52,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:52,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:52,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:09:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:52,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:52,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:52,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:52,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:52,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:52,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:52,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:52,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348835913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:52,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:52,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:09:52,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66280466] [2022-02-10 03:09:52,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:52,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:09:52,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:52,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:09:52,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:52,746 INFO L87 Difference]: Start difference. First operand 648 states and 1786 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:52,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:52,896 INFO L93 Difference]: Finished difference Result 670 states and 1841 transitions. [2022-02-10 03:09:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:09:52,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:52,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:52,897 INFO L225 Difference]: With dead ends: 670 [2022-02-10 03:09:52,897 INFO L226 Difference]: Without dead ends: 668 [2022-02-10 03:09:52,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:52,898 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:52,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 353 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-02-10 03:09:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-02-10 03:09:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 643. [2022-02-10 03:09:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.7601246105919004) internal successors, (1772), 642 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1772 transitions. [2022-02-10 03:09:52,904 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1772 transitions. Word has length 25 [2022-02-10 03:09:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:52,904 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1772 transitions. [2022-02-10 03:09:52,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1772 transitions. [2022-02-10 03:09:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:52,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:52,905 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:52,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-02-10 03:09:53,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:53,105 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1458419701, now seen corresponding path program 312 times [2022-02-10 03:09:53,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:53,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627551889] [2022-02-10 03:09:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:53,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:53,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:53,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627551889] [2022-02-10 03:09:53,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627551889] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:53,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197352413] [2022-02-10 03:09:53,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:53,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:53,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:53,193 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:53,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-02-10 03:09:53,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:09:53,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:53,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:09:53,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:53,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:09:53,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:09:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:53,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:53,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:53,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:09:53,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:53,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:09:53,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:53,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:53,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197352413] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:53,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:53,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:09:53,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714468657] [2022-02-10 03:09:53,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:53,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:09:53,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:53,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:09:53,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:53,566 INFO L87 Difference]: Start difference. First operand 643 states and 1772 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:53,719 INFO L93 Difference]: Finished difference Result 672 states and 1843 transitions. [2022-02-10 03:09:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:53,721 INFO L225 Difference]: With dead ends: 672 [2022-02-10 03:09:53,721 INFO L226 Difference]: Without dead ends: 672 [2022-02-10 03:09:53,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:09:53,721 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:53,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 101 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:09:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-02-10 03:09:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 634. [2022-02-10 03:09:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.7535545023696684) internal successors, (1743), 633 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1743 transitions. [2022-02-10 03:09:53,727 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1743 transitions. Word has length 25 [2022-02-10 03:09:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:53,727 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1743 transitions. [2022-02-10 03:09:53,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1743 transitions. [2022-02-10 03:09:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:53,728 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:53,728 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:53,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-02-10 03:09:53,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:53,928 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1974750577, now seen corresponding path program 313 times [2022-02-10 03:09:53,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:53,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986333019] [2022-02-10 03:09:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:53,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:54,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:54,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986333019] [2022-02-10 03:09:54,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986333019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:54,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18982462] [2022-02-10 03:09:54,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:54,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:54,039 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:54,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-02-10 03:09:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:54,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:54,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:54,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:54,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:54,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:09:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:54,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:54,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:54,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:09:54,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:54,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:54,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:54,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:54,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18982462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:54,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:54,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:54,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526071584] [2022-02-10 03:09:54,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:54,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:54,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:54,519 INFO L87 Difference]: Start difference. First operand 634 states and 1743 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:54,673 INFO L93 Difference]: Finished difference Result 672 states and 1844 transitions. [2022-02-10 03:09:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:54,674 INFO L225 Difference]: With dead ends: 672 [2022-02-10 03:09:54,674 INFO L226 Difference]: Without dead ends: 672 [2022-02-10 03:09:54,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:54,674 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:54,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 103 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 413 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-02-10 03:09:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-02-10 03:09:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 637. [2022-02-10 03:09:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.759433962264151) internal successors, (1755), 636 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1755 transitions. [2022-02-10 03:09:54,680 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1755 transitions. Word has length 25 [2022-02-10 03:09:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:54,680 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1755 transitions. [2022-02-10 03:09:54,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1755 transitions. [2022-02-10 03:09:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:54,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:54,681 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:54,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:54,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-02-10 03:09:54,881 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1290315893, now seen corresponding path program 314 times [2022-02-10 03:09:54,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:54,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794449340] [2022-02-10 03:09:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:54,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:54,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:54,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794449340] [2022-02-10 03:09:54,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794449340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:54,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181876358] [2022-02-10 03:09:54,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:09:54,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:54,981 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:54,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-02-10 03:09:55,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:09:55,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:55,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:55,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:09:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:55,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:55,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:55,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:09:55,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:55,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:55,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:55,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:55,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181876358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:55,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:55,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:09:55,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89256845] [2022-02-10 03:09:55,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:55,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:09:55,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:09:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:09:55,362 INFO L87 Difference]: Start difference. First operand 637 states and 1755 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:55,557 INFO L93 Difference]: Finished difference Result 671 states and 1827 transitions. [2022-02-10 03:09:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:55,558 INFO L225 Difference]: With dead ends: 671 [2022-02-10 03:09:55,558 INFO L226 Difference]: Without dead ends: 657 [2022-02-10 03:09:55,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:09:55,558 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:55,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 83 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:09:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-02-10 03:09:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 638. [2022-02-10 03:09:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7535321821036107) internal successors, (1754), 637 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1754 transitions. [2022-02-10 03:09:55,564 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1754 transitions. Word has length 25 [2022-02-10 03:09:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:55,565 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1754 transitions. [2022-02-10 03:09:55,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1754 transitions. [2022-02-10 03:09:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:55,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:55,565 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:55,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-02-10 03:09:55,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-02-10 03:09:55,766 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1566844149, now seen corresponding path program 315 times [2022-02-10 03:09:55,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:55,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745613180] [2022-02-10 03:09:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:55,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:55,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:55,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745613180] [2022-02-10 03:09:55,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745613180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:55,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340860072] [2022-02-10 03:09:55,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:09:55,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:55,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:55,881 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:55,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-02-10 03:09:55,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:09:55,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:55,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:55,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:56,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:56,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:56,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:56,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:56,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:56,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:09:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:56,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:56,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:56,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:09:56,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:56,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:56,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:56,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:56,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340860072] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:56,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:56,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:56,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683811613] [2022-02-10 03:09:56,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:56,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:56,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:56,388 INFO L87 Difference]: Start difference. First operand 638 states and 1754 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:56,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:56,512 INFO L93 Difference]: Finished difference Result 701 states and 1896 transitions. [2022-02-10 03:09:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:09:56,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:56,513 INFO L225 Difference]: With dead ends: 701 [2022-02-10 03:09:56,513 INFO L226 Difference]: Without dead ends: 701 [2022-02-10 03:09:56,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:56,513 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:56,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 130 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 313 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-02-10 03:09:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-02-10 03:09:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 640. [2022-02-10 03:09:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.76056338028169) internal successors, (1764), 639 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1764 transitions. [2022-02-10 03:09:56,520 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1764 transitions. Word has length 25 [2022-02-10 03:09:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:56,520 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1764 transitions. [2022-02-10 03:09:56,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1764 transitions. [2022-02-10 03:09:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:56,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:56,521 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:56,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-02-10 03:09:56,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-02-10 03:09:56,721 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1679754647, now seen corresponding path program 316 times [2022-02-10 03:09:56,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:56,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204545272] [2022-02-10 03:09:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:56,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:56,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:56,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204545272] [2022-02-10 03:09:56,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204545272] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:56,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652832086] [2022-02-10 03:09:56,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:09:56,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:56,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:56,856 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:56,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-02-10 03:09:56,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:09:56,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:56,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:57,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:57,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:57,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:57,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:57,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:57,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:09:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:57,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:57,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:57,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:09:57,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:57,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:57,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:57,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:57,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652832086] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:57,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:57,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:57,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360680384] [2022-02-10 03:09:57,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:57,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:57,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:57,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:57,378 INFO L87 Difference]: Start difference. First operand 640 states and 1764 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:57,482 INFO L93 Difference]: Finished difference Result 692 states and 1897 transitions. [2022-02-10 03:09:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:57,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:57,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:57,483 INFO L225 Difference]: With dead ends: 692 [2022-02-10 03:09:57,483 INFO L226 Difference]: Without dead ends: 692 [2022-02-10 03:09:57,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:57,484 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:57,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 74 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-02-10 03:09:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-02-10 03:09:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 645. [2022-02-10 03:09:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.7593167701863353) internal successors, (1777), 644 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1777 transitions. [2022-02-10 03:09:57,490 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1777 transitions. Word has length 25 [2022-02-10 03:09:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:57,490 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1777 transitions. [2022-02-10 03:09:57,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:57,490 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1777 transitions. [2022-02-10 03:09:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:57,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:57,491 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:57,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-02-10 03:09:57,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:57,691 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2087661075, now seen corresponding path program 317 times [2022-02-10 03:09:57,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:57,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848790776] [2022-02-10 03:09:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:57,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:57,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:57,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848790776] [2022-02-10 03:09:57,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848790776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:57,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426072334] [2022-02-10 03:09:57,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:09:57,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:57,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:57,801 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:57,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-02-10 03:09:57,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:09:57,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:57,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:57,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:58,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:58,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:58,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:58,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:09:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:58,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:58,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:58,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:09:58,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:58,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:58,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:58,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:58,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426072334] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:58,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:58,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:09:58,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936571906] [2022-02-10 03:09:58,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:58,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:09:58,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:58,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:09:58,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:58,340 INFO L87 Difference]: Start difference. First operand 645 states and 1777 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:58,513 INFO L93 Difference]: Finished difference Result 745 states and 2000 transitions. [2022-02-10 03:09:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:09:58,514 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:58,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:58,515 INFO L225 Difference]: With dead ends: 745 [2022-02-10 03:09:58,515 INFO L226 Difference]: Without dead ends: 745 [2022-02-10 03:09:58,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:09:58,515 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:58,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 162 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 484 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-02-10 03:09:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-02-10 03:09:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 644. [2022-02-10 03:09:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.769828926905132) internal successors, (1781), 643 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1781 transitions. [2022-02-10 03:09:58,522 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1781 transitions. Word has length 25 [2022-02-10 03:09:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:58,522 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 1781 transitions. [2022-02-10 03:09:58,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1781 transitions. [2022-02-10 03:09:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:58,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:58,523 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:58,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-02-10 03:09:58,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:58,723 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:58,723 INFO L85 PathProgramCache]: Analyzing trace with hash 820075019, now seen corresponding path program 318 times [2022-02-10 03:09:58,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:58,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539015509] [2022-02-10 03:09:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:58,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:58,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:58,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539015509] [2022-02-10 03:09:58,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539015509] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:58,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135262430] [2022-02-10 03:09:58,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:09:58,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:58,830 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:58,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-02-10 03:09:58,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:09:58,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:09:58,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:58,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:58,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:58,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:59,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:59,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:09:59,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:59,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:09:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:59,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:09:59,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:59,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:09:59,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:59,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:09:59,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:09:59,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:09:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:09:59,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135262430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:09:59,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:09:59,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:09:59,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762207341] [2022-02-10 03:09:59,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:09:59,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:09:59,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:09:59,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:09:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:59,314 INFO L87 Difference]: Start difference. First operand 644 states and 1781 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:59,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:09:59,440 INFO L93 Difference]: Finished difference Result 718 states and 1941 transitions. [2022-02-10 03:09:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:09:59,440 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:09:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:09:59,441 INFO L225 Difference]: With dead ends: 718 [2022-02-10 03:09:59,441 INFO L226 Difference]: Without dead ends: 718 [2022-02-10 03:09:59,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:09:59,442 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:09:59,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 134 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 329 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2022-02-10 03:09:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-02-10 03:09:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 634. [2022-02-10 03:09:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.7535545023696684) internal successors, (1743), 633 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1743 transitions. [2022-02-10 03:09:59,448 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1743 transitions. Word has length 25 [2022-02-10 03:09:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:09:59,448 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1743 transitions. [2022-02-10 03:09:59,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:09:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1743 transitions. [2022-02-10 03:09:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:09:59,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:09:59,449 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:09:59,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-02-10 03:09:59,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-02-10 03:09:59,650 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:09:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:09:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1194499023, now seen corresponding path program 319 times [2022-02-10 03:09:59,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:09:59,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314637187] [2022-02-10 03:09:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:09:59,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:09:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:09:59,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:09:59,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314637187] [2022-02-10 03:09:59,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314637187] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:09:59,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337386929] [2022-02-10 03:09:59,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:09:59,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:09:59,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:09:59,758 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:09:59,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-02-10 03:09:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:09:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:09:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:09:59,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:59,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:09:59,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:59,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:09:59,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:09:59,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:00,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:00,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:00,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:00,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:00,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:00,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:00,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:00,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337386929] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:00,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:00,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:00,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552328335] [2022-02-10 03:10:00,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:00,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:00,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:00,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:00,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:00,327 INFO L87 Difference]: Start difference. First operand 634 states and 1743 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:00,548 INFO L93 Difference]: Finished difference Result 732 states and 1977 transitions. [2022-02-10 03:10:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:10:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:00,550 INFO L225 Difference]: With dead ends: 732 [2022-02-10 03:10:00,550 INFO L226 Difference]: Without dead ends: 732 [2022-02-10 03:10:00,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:10:00,550 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:00,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 145 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 474 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-02-10 03:10:00,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-02-10 03:10:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 637. [2022-02-10 03:10:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.757861635220126) internal successors, (1754), 636 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1754 transitions. [2022-02-10 03:10:00,557 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1754 transitions. Word has length 25 [2022-02-10 03:10:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:00,557 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1754 transitions. [2022-02-10 03:10:00,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1754 transitions. [2022-02-10 03:10:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:00,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:00,559 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:00,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-02-10 03:10:00,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2022-02-10 03:10:00,760 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 899237293, now seen corresponding path program 320 times [2022-02-10 03:10:00,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:00,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360569744] [2022-02-10 03:10:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:00,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:00,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:00,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360569744] [2022-02-10 03:10:00,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360569744] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:00,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450022098] [2022-02-10 03:10:00,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:00,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:00,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:00,878 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:00,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-02-10 03:10:00,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:00,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:00,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:00,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:01,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:01,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:01,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:01,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:01,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:01,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:01,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:01,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:01,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:01,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:01,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:01,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450022098] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:01,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:01,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:01,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696603305] [2022-02-10 03:10:01,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:01,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:01,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:01,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:01,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:01,415 INFO L87 Difference]: Start difference. First operand 637 states and 1754 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:01,620 INFO L93 Difference]: Finished difference Result 696 states and 1899 transitions. [2022-02-10 03:10:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:01,621 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:01,622 INFO L225 Difference]: With dead ends: 696 [2022-02-10 03:10:01,622 INFO L226 Difference]: Without dead ends: 696 [2022-02-10 03:10:01,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:01,622 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:01,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 118 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 426 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-02-10 03:10:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-02-10 03:10:01,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 634. [2022-02-10 03:10:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.7535545023696684) internal successors, (1743), 633 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1743 transitions. [2022-02-10 03:10:01,629 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1743 transitions. Word has length 25 [2022-02-10 03:10:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:01,629 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1743 transitions. [2022-02-10 03:10:01,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1743 transitions. [2022-02-10 03:10:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:01,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:01,630 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:01,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-02-10 03:10:01,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2022-02-10 03:10:01,832 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:01,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1599773341, now seen corresponding path program 321 times [2022-02-10 03:10:01,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:01,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777337616] [2022-02-10 03:10:01,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:01,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:01,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:01,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777337616] [2022-02-10 03:10:01,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777337616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:01,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448628635] [2022-02-10 03:10:01,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:01,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:01,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:01,944 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:01,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-02-10 03:10:01,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:10:01,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:01,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:02,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:02,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:02,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:02,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:10:02,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:02,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:10:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:02,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:02,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:02,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:02,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:02,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:02,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:02,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:02,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448628635] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:02,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:02,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:02,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286958009] [2022-02-10 03:10:02,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:02,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:02,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:02,502 INFO L87 Difference]: Start difference. First operand 634 states and 1743 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:02,680 INFO L93 Difference]: Finished difference Result 694 states and 1898 transitions. [2022-02-10 03:10:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:02,682 INFO L225 Difference]: With dead ends: 694 [2022-02-10 03:10:02,682 INFO L226 Difference]: Without dead ends: 694 [2022-02-10 03:10:02,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:02,682 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:02,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 130 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 418 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-02-10 03:10:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-02-10 03:10:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 632. [2022-02-10 03:10:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.75594294770206) internal successors, (1739), 631 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1739 transitions. [2022-02-10 03:10:02,688 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1739 transitions. Word has length 25 [2022-02-10 03:10:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:02,688 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1739 transitions. [2022-02-10 03:10:02,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1739 transitions. [2022-02-10 03:10:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:02,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:02,689 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:02,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-02-10 03:10:02,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:02,890 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:02,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:02,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1568996887, now seen corresponding path program 322 times [2022-02-10 03:10:02,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:02,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420307219] [2022-02-10 03:10:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:02,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:03,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:03,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420307219] [2022-02-10 03:10:03,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420307219] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:03,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139334476] [2022-02-10 03:10:03,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:03,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:03,029 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:03,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-02-10 03:10:03,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:03,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:03,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:03,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:03,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:03,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:03,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:10:03,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:03,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:10:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:03,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:03,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:03,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-10 03:10:03,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:03,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:03,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:03,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:03,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139334476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:03,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:03,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:10:03,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491868450] [2022-02-10 03:10:03,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:03,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:10:03,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:03,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:10:03,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:03,637 INFO L87 Difference]: Start difference. First operand 632 states and 1739 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:03,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:03,792 INFO L93 Difference]: Finished difference Result 671 states and 1819 transitions. [2022-02-10 03:10:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:10:03,792 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:03,793 INFO L225 Difference]: With dead ends: 671 [2022-02-10 03:10:03,793 INFO L226 Difference]: Without dead ends: 657 [2022-02-10 03:10:03,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:03,793 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:03,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 102 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 286 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-02-10 03:10:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-02-10 03:10:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 634. [2022-02-10 03:10:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.7456556082148498) internal successors, (1738), 633 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1738 transitions. [2022-02-10 03:10:03,800 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1738 transitions. Word has length 25 [2022-02-10 03:10:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:03,800 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1738 transitions. [2022-02-10 03:10:03,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1738 transitions. [2022-02-10 03:10:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:03,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:03,801 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:03,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-02-10 03:10:04,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:04,001 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:04,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1845525143, now seen corresponding path program 323 times [2022-02-10 03:10:04,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:04,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886326054] [2022-02-10 03:10:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:04,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:04,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:04,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886326054] [2022-02-10 03:10:04,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886326054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:04,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184305428] [2022-02-10 03:10:04,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:04,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:04,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:04,111 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:04,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-02-10 03:10:04,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:10:04,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:04,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:04,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:04,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:04,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:04,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:04,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:04,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:04,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:10:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:04,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:04,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:04,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:04,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:04,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:04,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:04,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:04,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184305428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:04,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:04,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:04,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140097729] [2022-02-10 03:10:04,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:04,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:04,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:04,763 INFO L87 Difference]: Start difference. First operand 634 states and 1738 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:04,891 INFO L93 Difference]: Finished difference Result 740 states and 1991 transitions. [2022-02-10 03:10:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:04,892 INFO L225 Difference]: With dead ends: 740 [2022-02-10 03:10:04,892 INFO L226 Difference]: Without dead ends: 740 [2022-02-10 03:10:04,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:04,892 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:04,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 266 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-02-10 03:10:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-02-10 03:10:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 638. [2022-02-10 03:10:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7629513343799057) internal successors, (1760), 637 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1760 transitions. [2022-02-10 03:10:04,899 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1760 transitions. Word has length 25 [2022-02-10 03:10:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:04,899 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1760 transitions. [2022-02-10 03:10:04,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1760 transitions. [2022-02-10 03:10:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:04,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:04,900 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:04,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-02-10 03:10:05,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:05,100 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1181856097, now seen corresponding path program 324 times [2022-02-10 03:10:05,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:05,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543544562] [2022-02-10 03:10:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:05,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:05,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:05,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543544562] [2022-02-10 03:10:05,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543544562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:05,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373556651] [2022-02-10 03:10:05,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:05,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:05,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:05,213 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:05,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-02-10 03:10:05,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:10:05,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:05,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:05,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:05,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:05,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:05,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:05,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:10:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:05,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:05,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:05,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:05,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:05,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:05,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:05,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:05,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373556651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:05,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:05,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:05,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201118101] [2022-02-10 03:10:05,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:05,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:05,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:05,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:05,812 INFO L87 Difference]: Start difference. First operand 638 states and 1760 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:05,996 INFO L93 Difference]: Finished difference Result 773 states and 2052 transitions. [2022-02-10 03:10:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:05,997 INFO L225 Difference]: With dead ends: 773 [2022-02-10 03:10:05,997 INFO L226 Difference]: Without dead ends: 773 [2022-02-10 03:10:05,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:05,998 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:05,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 184 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 411 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2022-02-10 03:10:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-02-10 03:10:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 628. [2022-02-10 03:10:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 2.7464114832535884) internal successors, (1722), 627 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1722 transitions. [2022-02-10 03:10:06,004 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1722 transitions. Word has length 25 [2022-02-10 03:10:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:06,004 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1722 transitions. [2022-02-10 03:10:06,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1722 transitions. [2022-02-10 03:10:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:06,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:06,005 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:06,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-02-10 03:10:06,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-02-10 03:10:06,206 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1013773591, now seen corresponding path program 325 times [2022-02-10 03:10:06,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:06,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394396977] [2022-02-10 03:10:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:06,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:06,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:06,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394396977] [2022-02-10 03:10:06,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394396977] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:06,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845322054] [2022-02-10 03:10:06,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:06,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:06,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:06,326 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:06,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-02-10 03:10:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:06,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:06,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:06,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:06,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:10:06,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:06,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:10:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:06,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:06,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:06,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-10 03:10:06,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:06,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:06,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:06,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:06,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845322054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:06,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:06,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:10:06,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35353538] [2022-02-10 03:10:06,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:06,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:10:06,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:10:06,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:10:06,802 INFO L87 Difference]: Start difference. First operand 628 states and 1722 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:06,953 INFO L93 Difference]: Finished difference Result 667 states and 1798 transitions. [2022-02-10 03:10:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:06,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:06,955 INFO L225 Difference]: With dead ends: 667 [2022-02-10 03:10:06,955 INFO L226 Difference]: Without dead ends: 663 [2022-02-10 03:10:06,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:06,955 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:06,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 84 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 269 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-02-10 03:10:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-02-10 03:10:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 635. [2022-02-10 03:10:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 2.728706624605678) internal successors, (1730), 634 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1730 transitions. [2022-02-10 03:10:06,961 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1730 transitions. Word has length 25 [2022-02-10 03:10:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:06,961 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1730 transitions. [2022-02-10 03:10:06,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1730 transitions. [2022-02-10 03:10:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:06,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:06,962 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:06,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-02-10 03:10:07,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:07,163 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash 847056523, now seen corresponding path program 326 times [2022-02-10 03:10:07,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:07,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481444263] [2022-02-10 03:10:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:07,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:07,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:07,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481444263] [2022-02-10 03:10:07,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481444263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:07,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037158279] [2022-02-10 03:10:07,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:07,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:07,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:07,289 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:07,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-02-10 03:10:07,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:07,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:07,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:07,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:07,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:07,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:07,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:10:07,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:07,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:10:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:07,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:07,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:07,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:07,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:07,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:07,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:07,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:07,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037158279] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:07,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:07,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:10:07,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069943929] [2022-02-10 03:10:07,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:07,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:10:07,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:10:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:10:07,799 INFO L87 Difference]: Start difference. First operand 635 states and 1730 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:07,972 INFO L93 Difference]: Finished difference Result 655 states and 1780 transitions. [2022-02-10 03:10:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:07,974 INFO L225 Difference]: With dead ends: 655 [2022-02-10 03:10:07,974 INFO L226 Difference]: Without dead ends: 646 [2022-02-10 03:10:07,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:07,974 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:07,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 208 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-02-10 03:10:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-02-10 03:10:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 628. [2022-02-10 03:10:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 2.74481658692185) internal successors, (1721), 627 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1721 transitions. [2022-02-10 03:10:07,980 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1721 transitions. Word has length 25 [2022-02-10 03:10:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:07,980 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1721 transitions. [2022-02-10 03:10:07,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1721 transitions. [2022-02-10 03:10:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:07,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:07,981 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:07,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-02-10 03:10:08,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-02-10 03:10:08,181 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1886263115, now seen corresponding path program 327 times [2022-02-10 03:10:08,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:08,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543799964] [2022-02-10 03:10:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:08,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:08,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:08,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543799964] [2022-02-10 03:10:08,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543799964] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:08,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480764834] [2022-02-10 03:10:08,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:08,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:08,293 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:08,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-02-10 03:10:08,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:10:08,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:08,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:08,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:08,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:08,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:08,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:08,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:08,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:10:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:08,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:08,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:08,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:08,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:08,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:08,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:08,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:08,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480764834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:08,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:08,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:10:08,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979874206] [2022-02-10 03:10:08,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:08,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:10:08,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:08,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:10:08,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:08,862 INFO L87 Difference]: Start difference. First operand 628 states and 1721 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:08,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:08,998 INFO L93 Difference]: Finished difference Result 738 states and 1989 transitions. [2022-02-10 03:10:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:08,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:09,000 INFO L225 Difference]: With dead ends: 738 [2022-02-10 03:10:09,000 INFO L226 Difference]: Without dead ends: 738 [2022-02-10 03:10:09,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:10:09,000 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:09,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 183 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 285 Invalid, 0 Unknown, 144 Unchecked, 0.1s Time] [2022-02-10 03:10:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-02-10 03:10:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 636. [2022-02-10 03:10:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.762204724409449) internal successors, (1754), 635 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1754 transitions. [2022-02-10 03:10:09,006 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1754 transitions. Word has length 25 [2022-02-10 03:10:09,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:09,006 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1754 transitions. [2022-02-10 03:10:09,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:09,007 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1754 transitions. [2022-02-10 03:10:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:09,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:09,007 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:09,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-02-10 03:10:09,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-02-10 03:10:09,208 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1132916329, now seen corresponding path program 328 times [2022-02-10 03:10:09,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:09,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983385932] [2022-02-10 03:10:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:09,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:09,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:09,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983385932] [2022-02-10 03:10:09,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983385932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:09,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581582702] [2022-02-10 03:10:09,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:09,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:09,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:09,322 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:09,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-02-10 03:10:09,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:09,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:09,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:09,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:09,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:09,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:09,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:09,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:09,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:10:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:09,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:09,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:09,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:09,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:09,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:09,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:09,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:09,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581582702] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:09,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:09,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:09,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891945933] [2022-02-10 03:10:09,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:09,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:09,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:09,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:09,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:09,893 INFO L87 Difference]: Start difference. First operand 636 states and 1754 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:10,027 INFO L93 Difference]: Finished difference Result 741 states and 1999 transitions. [2022-02-10 03:10:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:10,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:10,028 INFO L225 Difference]: With dead ends: 741 [2022-02-10 03:10:10,028 INFO L226 Difference]: Without dead ends: 741 [2022-02-10 03:10:10,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:10,029 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:10,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 85 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 277 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-02-10 03:10:10,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-02-10 03:10:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 636. [2022-02-10 03:10:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.762204724409449) internal successors, (1754), 635 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1754 transitions. [2022-02-10 03:10:10,036 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1754 transitions. Word has length 25 [2022-02-10 03:10:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:10,036 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1754 transitions. [2022-02-10 03:10:10,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1754 transitions. [2022-02-10 03:10:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:10,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:10,037 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:10,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-02-10 03:10:10,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2022-02-10 03:10:10,237 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:10,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1765421829, now seen corresponding path program 329 times [2022-02-10 03:10:10,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:10,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588303819] [2022-02-10 03:10:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:10,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:10,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:10,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588303819] [2022-02-10 03:10:10,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588303819] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:10,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985993464] [2022-02-10 03:10:10,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:10,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:10,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:10,338 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:10,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-02-10 03:10:10,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:10:10,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:10,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:10,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:10,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:10:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:10,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:10,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:10,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:10,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:10,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:10,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:10,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:10,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985993464] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:10,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:10,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:10:10,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492985241] [2022-02-10 03:10:10,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:10,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:10:10,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:10,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:10:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:10:10,673 INFO L87 Difference]: Start difference. First operand 636 states and 1754 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:10,841 INFO L93 Difference]: Finished difference Result 668 states and 1841 transitions. [2022-02-10 03:10:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:10:10,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:10,842 INFO L225 Difference]: With dead ends: 668 [2022-02-10 03:10:10,843 INFO L226 Difference]: Without dead ends: 668 [2022-02-10 03:10:10,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:10:10,843 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:10,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 97 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:10:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-02-10 03:10:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 637. [2022-02-10 03:10:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.7625786163522013) internal successors, (1757), 636 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1757 transitions. [2022-02-10 03:10:10,849 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1757 transitions. Word has length 25 [2022-02-10 03:10:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:10,849 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1757 transitions. [2022-02-10 03:10:10,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1757 transitions. [2022-02-10 03:10:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:10,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:10,850 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:10,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-02-10 03:10:11,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:11,050 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:11,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2060683559, now seen corresponding path program 330 times [2022-02-10 03:10:11,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:11,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360879906] [2022-02-10 03:10:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:11,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:11,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:11,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360879906] [2022-02-10 03:10:11,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360879906] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:11,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336276691] [2022-02-10 03:10:11,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:11,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:11,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:11,161 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:11,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-02-10 03:10:11,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:10:11,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:11,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:11,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:11,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:11,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:11,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:11,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:11,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:10:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:11,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:11,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:11,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:11,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:11,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:11,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:11,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:11,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336276691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:11,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:11,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:10:11,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700826468] [2022-02-10 03:10:11,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:11,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:10:11,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:10:11,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:11,617 INFO L87 Difference]: Start difference. First operand 637 states and 1757 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:11,822 INFO L93 Difference]: Finished difference Result 693 states and 1881 transitions. [2022-02-10 03:10:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:11,824 INFO L225 Difference]: With dead ends: 693 [2022-02-10 03:10:11,824 INFO L226 Difference]: Without dead ends: 693 [2022-02-10 03:10:11,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:10:11,824 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:11,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 94 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 341 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-02-10 03:10:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-02-10 03:10:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 637. [2022-02-10 03:10:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.7625786163522013) internal successors, (1757), 636 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1757 transitions. [2022-02-10 03:10:11,830 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1757 transitions. Word has length 25 [2022-02-10 03:10:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:11,830 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1757 transitions. [2022-02-10 03:10:11,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1757 transitions. [2022-02-10 03:10:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:11,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:11,831 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:11,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-02-10 03:10:12,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:12,031 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:12,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1331398781, now seen corresponding path program 331 times [2022-02-10 03:10:12,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:12,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691800473] [2022-02-10 03:10:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:12,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:12,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:12,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691800473] [2022-02-10 03:10:12,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691800473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:12,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859257437] [2022-02-10 03:10:12,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:12,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:12,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:12,157 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:12,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-02-10 03:10:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:12,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:12,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:12,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:10:12,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:12,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:10:12,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:12,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:10:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:12,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:12,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:12,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:12,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:12,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:12,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:12,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:12,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859257437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:12,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:12,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:10:12,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103876294] [2022-02-10 03:10:12,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:12,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:10:12,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:12,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:10:12,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:12,639 INFO L87 Difference]: Start difference. First operand 637 states and 1757 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:12,793 INFO L93 Difference]: Finished difference Result 694 states and 1885 transitions. [2022-02-10 03:10:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:10:12,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:12,795 INFO L225 Difference]: With dead ends: 694 [2022-02-10 03:10:12,795 INFO L226 Difference]: Without dead ends: 694 [2022-02-10 03:10:12,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:12,795 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:12,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 102 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 403 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-02-10 03:10:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-02-10 03:10:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 637. [2022-02-10 03:10:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.7625786163522013) internal successors, (1757), 636 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1757 transitions. [2022-02-10 03:10:12,801 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1757 transitions. Word has length 25 [2022-02-10 03:10:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:12,801 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1757 transitions. [2022-02-10 03:10:12,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1757 transitions. [2022-02-10 03:10:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:12,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:12,802 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:12,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-02-10 03:10:13,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:13,003 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2086819859, now seen corresponding path program 332 times [2022-02-10 03:10:13,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:13,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586648347] [2022-02-10 03:10:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:13,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:13,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:13,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586648347] [2022-02-10 03:10:13,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586648347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:13,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028376991] [2022-02-10 03:10:13,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:13,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:13,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:13,096 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:13,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-02-10 03:10:13,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:13,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:13,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:13,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:13,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:13,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:13,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:13,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:13,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:13,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:13,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:13,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:13,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028376991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:13,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:13,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:10:13,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66576460] [2022-02-10 03:10:13,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:13,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:10:13,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:13,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:10:13,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:10:13,553 INFO L87 Difference]: Start difference. First operand 637 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:13,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:13,728 INFO L93 Difference]: Finished difference Result 682 states and 1880 transitions. [2022-02-10 03:10:13,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:10:13,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:13,729 INFO L225 Difference]: With dead ends: 682 [2022-02-10 03:10:13,729 INFO L226 Difference]: Without dead ends: 682 [2022-02-10 03:10:13,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:13,729 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:13,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 84 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 344 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-02-10 03:10:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-02-10 03:10:13,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 638. [2022-02-10 03:10:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7629513343799057) internal successors, (1760), 637 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1760 transitions. [2022-02-10 03:10:13,735 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1760 transitions. Word has length 25 [2022-02-10 03:10:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:13,736 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1760 transitions. [2022-02-10 03:10:13,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1760 transitions. [2022-02-10 03:10:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:13,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:13,736 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:13,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-02-10 03:10:13,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:13,937 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1912885707, now seen corresponding path program 333 times [2022-02-10 03:10:13,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:13,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720124216] [2022-02-10 03:10:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:13,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:14,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:14,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720124216] [2022-02-10 03:10:14,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720124216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:14,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375951623] [2022-02-10 03:10:14,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:14,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:14,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:14,056 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:14,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-02-10 03:10:14,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:10:14,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:14,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:14,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:14,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:14,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:14,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:10:14,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:14,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:10:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:14,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:14,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:14,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:14,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:14,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:14,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:14,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:14,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375951623] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:14,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:14,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:10:14,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817876323] [2022-02-10 03:10:14,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:14,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:10:14,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:10:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:14,580 INFO L87 Difference]: Start difference. First operand 638 states and 1760 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:14,918 INFO L93 Difference]: Finished difference Result 724 states and 1966 transitions. [2022-02-10 03:10:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:10:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:14,919 INFO L225 Difference]: With dead ends: 724 [2022-02-10 03:10:14,919 INFO L226 Difference]: Without dead ends: 724 [2022-02-10 03:10:14,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:10:14,919 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:14,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 135 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 448 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-02-10 03:10:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-10 03:10:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 638. [2022-02-10 03:10:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7629513343799057) internal successors, (1760), 637 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1760 transitions. [2022-02-10 03:10:14,926 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1760 transitions. Word has length 25 [2022-02-10 03:10:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:14,926 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1760 transitions. [2022-02-10 03:10:14,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1760 transitions. [2022-02-10 03:10:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:14,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:14,927 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:14,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-02-10 03:10:15,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:15,127 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1681545541, now seen corresponding path program 334 times [2022-02-10 03:10:15,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:15,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696903735] [2022-02-10 03:10:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:15,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:15,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:15,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696903735] [2022-02-10 03:10:15,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696903735] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:15,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377930316] [2022-02-10 03:10:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:15,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:15,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:15,217 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:15,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-02-10 03:10:15,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:15,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:15,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:15,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:15,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:15,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:15,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:10:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:15,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:15,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:15,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:15,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:15,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:15,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:15,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:15,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377930316] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:15,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:15,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:10:15,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130536191] [2022-02-10 03:10:15,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:15,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:10:15,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:15,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:10:15,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:15,693 INFO L87 Difference]: Start difference. First operand 638 states and 1760 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:15,842 INFO L93 Difference]: Finished difference Result 692 states and 1906 transitions. [2022-02-10 03:10:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:10:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:15,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:15,843 INFO L225 Difference]: With dead ends: 692 [2022-02-10 03:10:15,843 INFO L226 Difference]: Without dead ends: 692 [2022-02-10 03:10:15,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:10:15,843 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:15,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 65 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 251 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-02-10 03:10:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-02-10 03:10:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 638. [2022-02-10 03:10:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7629513343799057) internal successors, (1760), 637 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1760 transitions. [2022-02-10 03:10:15,850 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1760 transitions. Word has length 25 [2022-02-10 03:10:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:15,850 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1760 transitions. [2022-02-10 03:10:15,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1760 transitions. [2022-02-10 03:10:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:15,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:15,851 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:15,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-02-10 03:10:16,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:16,051 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:16,051 INFO L85 PathProgramCache]: Analyzing trace with hash -831876729, now seen corresponding path program 335 times [2022-02-10 03:10:16,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:16,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556408626] [2022-02-10 03:10:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:16,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:16,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:16,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556408626] [2022-02-10 03:10:16,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556408626] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:16,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964479054] [2022-02-10 03:10:16,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:16,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:16,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:16,141 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:16,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-02-10 03:10:16,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:10:16,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:16,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:16,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:16,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:16,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:16,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:16,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:10:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:16,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:16,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:16,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:16,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:16,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:16,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:16,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:16,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964479054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:16,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:16,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:10:16,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592061485] [2022-02-10 03:10:16,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:16,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:10:16,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:16,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:10:16,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:10:16,734 INFO L87 Difference]: Start difference. First operand 638 states and 1760 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:16,936 INFO L93 Difference]: Finished difference Result 706 states and 1910 transitions. [2022-02-10 03:10:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:10:16,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:16,938 INFO L225 Difference]: With dead ends: 706 [2022-02-10 03:10:16,938 INFO L226 Difference]: Without dead ends: 694 [2022-02-10 03:10:16,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:10:16,938 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:16,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 165 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 331 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-02-10 03:10:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-02-10 03:10:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 654. [2022-02-10 03:10:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.76416539050536) internal successors, (1805), 653 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1805 transitions. [2022-02-10 03:10:16,944 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1805 transitions. Word has length 25 [2022-02-10 03:10:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:16,944 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1805 transitions. [2022-02-10 03:10:16,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1805 transitions. [2022-02-10 03:10:16,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:16,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:16,945 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:16,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-02-10 03:10:17,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:17,145 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:17,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:17,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1653054983, now seen corresponding path program 336 times [2022-02-10 03:10:17,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:17,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440776842] [2022-02-10 03:10:17,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:17,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:17,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:17,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440776842] [2022-02-10 03:10:17,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440776842] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:17,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36079728] [2022-02-10 03:10:17,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:17,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:17,294 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:17,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-02-10 03:10:17,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:10:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:17,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:17,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:17,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:17,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:17,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:17,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:10:17,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:17,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:10:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:17,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:17,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:17,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:10:17,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:17,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:17,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:17,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:10:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:17,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36079728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:17,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:17,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:17,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112548703] [2022-02-10 03:10:17,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:17,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:17,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:17,978 INFO L87 Difference]: Start difference. First operand 654 states and 1805 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:18,159 INFO L93 Difference]: Finished difference Result 686 states and 1881 transitions. [2022-02-10 03:10:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:10:18,159 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:18,160 INFO L225 Difference]: With dead ends: 686 [2022-02-10 03:10:18,160 INFO L226 Difference]: Without dead ends: 686 [2022-02-10 03:10:18,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:18,160 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:18,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 85 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 318 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-02-10 03:10:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-02-10 03:10:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 654. [2022-02-10 03:10:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.76416539050536) internal successors, (1805), 653 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1805 transitions. [2022-02-10 03:10:18,167 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1805 transitions. Word has length 25 [2022-02-10 03:10:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:18,167 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1805 transitions. [2022-02-10 03:10:18,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1805 transitions. [2022-02-10 03:10:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:18,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:18,168 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:18,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-02-10 03:10:18,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-02-10 03:10:18,368 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2251019, now seen corresponding path program 337 times [2022-02-10 03:10:18,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:18,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42304659] [2022-02-10 03:10:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:18,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:18,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:18,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42304659] [2022-02-10 03:10:18,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42304659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:18,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024049251] [2022-02-10 03:10:18,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:18,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:18,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:18,482 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:18,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-02-10 03:10:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:18,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:18,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:18,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:10:18,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:18,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2022-02-10 03:10:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:18,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:18,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:18,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:19,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:19,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:19,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:19,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:19,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024049251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:19,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:19,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:10:19,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624803740] [2022-02-10 03:10:19,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:19,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:10:19,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:10:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:19,070 INFO L87 Difference]: Start difference. First operand 654 states and 1805 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:19,240 INFO L93 Difference]: Finished difference Result 695 states and 1919 transitions. [2022-02-10 03:10:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:10:19,241 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:19,242 INFO L225 Difference]: With dead ends: 695 [2022-02-10 03:10:19,242 INFO L226 Difference]: Without dead ends: 695 [2022-02-10 03:10:19,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:10:19,242 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:19,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 72 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-02-10 03:10:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-02-10 03:10:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 655. [2022-02-10 03:10:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.764525993883792) internal successors, (1808), 654 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1808 transitions. [2022-02-10 03:10:19,248 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1808 transitions. Word has length 25 [2022-02-10 03:10:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:19,248 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1808 transitions. [2022-02-10 03:10:19,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1808 transitions. [2022-02-10 03:10:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:19,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:19,249 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:19,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-02-10 03:10:19,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-02-10 03:10:19,450 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:19,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1477868597, now seen corresponding path program 338 times [2022-02-10 03:10:19,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:19,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513900325] [2022-02-10 03:10:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:19,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:10:19,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:19,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513900325] [2022-02-10 03:10:19,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513900325] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:19,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084606905] [2022-02-10 03:10:19,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:19,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:19,565 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:19,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-02-10 03:10:19,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:19,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:19,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:19,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:19,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:19,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:10:19,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:19,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:10:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:10:19,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:20,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:20,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:20,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:20,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:20,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:20,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:10:20,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084606905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:20,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:20,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:10:20,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015635655] [2022-02-10 03:10:20,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:20,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:10:20,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:10:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:20,119 INFO L87 Difference]: Start difference. First operand 655 states and 1808 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:20,337 INFO L93 Difference]: Finished difference Result 690 states and 1900 transitions. [2022-02-10 03:10:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:20,337 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:20,338 INFO L225 Difference]: With dead ends: 690 [2022-02-10 03:10:20,338 INFO L226 Difference]: Without dead ends: 690 [2022-02-10 03:10:20,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:10:20,338 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:20,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 320 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-02-10 03:10:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-02-10 03:10:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 638. [2022-02-10 03:10:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7629513343799057) internal successors, (1760), 637 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1760 transitions. [2022-02-10 03:10:20,345 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1760 transitions. Word has length 25 [2022-02-10 03:10:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:20,345 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1760 transitions. [2022-02-10 03:10:20,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1760 transitions. [2022-02-10 03:10:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:20,345 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:20,345 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:20,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-02-10 03:10:20,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-02-10 03:10:20,546 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1247522493, now seen corresponding path program 339 times [2022-02-10 03:10:20,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:20,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185195771] [2022-02-10 03:10:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:20,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:20,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:20,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185195771] [2022-02-10 03:10:20,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185195771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:20,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304947846] [2022-02-10 03:10:20,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:20,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:20,692 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:20,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-02-10 03:10:20,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:10:20,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:20,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:20,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:20,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:20,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:20,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:20,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:20,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:21,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:21,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:21,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:21,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:21,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:21,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:21,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:21,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304947846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:21,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:21,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:21,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668383321] [2022-02-10 03:10:21,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:21,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:21,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:21,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:21,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:21,220 INFO L87 Difference]: Start difference. First operand 638 states and 1760 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:21,585 INFO L93 Difference]: Finished difference Result 746 states and 2000 transitions. [2022-02-10 03:10:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:10:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:21,587 INFO L225 Difference]: With dead ends: 746 [2022-02-10 03:10:21,587 INFO L226 Difference]: Without dead ends: 746 [2022-02-10 03:10:21,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:10:21,587 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:21,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 149 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 499 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2022-02-10 03:10:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-02-10 03:10:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 643. [2022-02-10 03:10:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.7741433021806854) internal successors, (1781), 642 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1781 transitions. [2022-02-10 03:10:21,594 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1781 transitions. Word has length 25 [2022-02-10 03:10:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:21,594 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1781 transitions. [2022-02-10 03:10:21,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1781 transitions. [2022-02-10 03:10:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:21,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:21,595 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:21,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-02-10 03:10:21,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:21,795 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:21,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1395055767, now seen corresponding path program 340 times [2022-02-10 03:10:21,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:21,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531117435] [2022-02-10 03:10:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:21,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:21,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:21,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531117435] [2022-02-10 03:10:21,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531117435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:21,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213415674] [2022-02-10 03:10:21,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:21,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:21,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:21,944 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:21,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-02-10 03:10:21,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:21,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:21,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:21,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:22,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:22,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:22,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:22,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-02-10 03:10:22,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:22,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2022-02-10 03:10:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:22,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:22,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:22,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:22,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:22,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:22,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:22,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:22,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213415674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:22,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:22,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:10:22,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373366535] [2022-02-10 03:10:22,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:22,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:10:22,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:22,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:10:22,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:22,651 INFO L87 Difference]: Start difference. First operand 643 states and 1781 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:22,761 INFO L93 Difference]: Finished difference Result 675 states and 1850 transitions. [2022-02-10 03:10:22,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:22,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:22,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:22,762 INFO L225 Difference]: With dead ends: 675 [2022-02-10 03:10:22,762 INFO L226 Difference]: Without dead ends: 667 [2022-02-10 03:10:22,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:22,763 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:22,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 64 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-02-10 03:10:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-10 03:10:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 638. [2022-02-10 03:10:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7629513343799057) internal successors, (1760), 637 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1760 transitions. [2022-02-10 03:10:22,769 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1760 transitions. Word has length 25 [2022-02-10 03:10:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:22,769 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1760 transitions. [2022-02-10 03:10:22,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1760 transitions. [2022-02-10 03:10:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:22,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:22,770 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:22,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-02-10 03:10:22,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2022-02-10 03:10:22,970 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:22,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1089875945, now seen corresponding path program 341 times [2022-02-10 03:10:22,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:22,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054490623] [2022-02-10 03:10:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:22,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:23,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:23,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054490623] [2022-02-10 03:10:23,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054490623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:23,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635871298] [2022-02-10 03:10:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:23,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:23,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:23,104 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:23,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-02-10 03:10:23,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:10:23,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:23,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:23,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:23,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:23,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:23,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:23,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:23,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:23,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:23,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:23,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:10:23,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:23,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:23,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:23,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:10:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:23,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635871298] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:23,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:23,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:23,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785900843] [2022-02-10 03:10:23,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:23,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:23,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:23,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:23,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:23,691 INFO L87 Difference]: Start difference. First operand 638 states and 1760 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:24,005 INFO L93 Difference]: Finished difference Result 699 states and 1899 transitions. [2022-02-10 03:10:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:24,006 INFO L225 Difference]: With dead ends: 699 [2022-02-10 03:10:24,006 INFO L226 Difference]: Without dead ends: 699 [2022-02-10 03:10:24,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:10:24,006 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:24,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 119 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 402 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-02-10 03:10:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-02-10 03:10:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 641. [2022-02-10 03:10:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.76875) internal successors, (1772), 640 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1772 transitions. [2022-02-10 03:10:24,012 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1772 transitions. Word has length 25 [2022-02-10 03:10:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:24,013 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1772 transitions. [2022-02-10 03:10:24,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1772 transitions. [2022-02-10 03:10:24,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:24,013 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:24,013 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:24,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-02-10 03:10:24,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-02-10 03:10:24,214 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:24,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:24,214 INFO L85 PathProgramCache]: Analyzing trace with hash -993348017, now seen corresponding path program 342 times [2022-02-10 03:10:24,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:24,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093791369] [2022-02-10 03:10:24,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:24,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:24,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:24,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093791369] [2022-02-10 03:10:24,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093791369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:24,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633085607] [2022-02-10 03:10:24,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:24,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:24,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:24,319 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:24,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-02-10 03:10:24,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:10:24,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:24,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:24,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:24,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:24,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:24,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:24,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:24,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:24,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:24,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:24,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:24,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:24,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:24,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:24,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:24,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633085607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:24,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:24,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:10:24,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133563528] [2022-02-10 03:10:24,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:24,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:10:24,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:10:24,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:10:24,786 INFO L87 Difference]: Start difference. First operand 641 states and 1772 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:25,029 INFO L93 Difference]: Finished difference Result 684 states and 1878 transitions. [2022-02-10 03:10:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:10:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:25,030 INFO L225 Difference]: With dead ends: 684 [2022-02-10 03:10:25,030 INFO L226 Difference]: Without dead ends: 676 [2022-02-10 03:10:25,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:10:25,031 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:25,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 85 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 326 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-02-10 03:10:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-10 03:10:25,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 641. [2022-02-10 03:10:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.7671875) internal successors, (1771), 640 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1771 transitions. [2022-02-10 03:10:25,038 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1771 transitions. Word has length 25 [2022-02-10 03:10:25,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:25,038 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1771 transitions. [2022-02-10 03:10:25,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1771 transitions. [2022-02-10 03:10:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:25,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:25,039 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:25,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-02-10 03:10:25,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-02-10 03:10:25,240 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash 794614215, now seen corresponding path program 343 times [2022-02-10 03:10:25,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:25,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57611879] [2022-02-10 03:10:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:25,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:25,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:25,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57611879] [2022-02-10 03:10:25,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57611879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:25,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555699611] [2022-02-10 03:10:25,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:25,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:25,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:25,390 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:25,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-02-10 03:10:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:25,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:25,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:25,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:25,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:25,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:25,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:25,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:25,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:25,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:10:25,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:25,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:25,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:25,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:10:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:25,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555699611] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:25,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:25,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:25,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324131057] [2022-02-10 03:10:25,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:25,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:25,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:25,938 INFO L87 Difference]: Start difference. First operand 641 states and 1771 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:26,167 INFO L93 Difference]: Finished difference Result 683 states and 1869 transitions. [2022-02-10 03:10:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:26,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:26,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:26,169 INFO L225 Difference]: With dead ends: 683 [2022-02-10 03:10:26,169 INFO L226 Difference]: Without dead ends: 683 [2022-02-10 03:10:26,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:10:26,169 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:26,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 85 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 313 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-02-10 03:10:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-02-10 03:10:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 637. [2022-02-10 03:10:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.7625786163522013) internal successors, (1757), 636 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1757 transitions. [2022-02-10 03:10:26,175 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1757 transitions. Word has length 25 [2022-02-10 03:10:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:26,175 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1757 transitions. [2022-02-10 03:10:26,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1757 transitions. [2022-02-10 03:10:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:26,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:26,176 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:26,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-02-10 03:10:26,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:26,377 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -519805173, now seen corresponding path program 344 times [2022-02-10 03:10:26,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:26,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509515] [2022-02-10 03:10:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:26,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:26,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:26,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509515] [2022-02-10 03:10:26,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509515] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:26,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697718357] [2022-02-10 03:10:26,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:26,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:26,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:26,516 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:26,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-02-10 03:10:26,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:26,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:26,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:26,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:26,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:26,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:26,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:26,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:26,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:10:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:26,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:26,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:26,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:27,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:27,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:27,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:27,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:27,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697718357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:27,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:27,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:10:27,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128734757] [2022-02-10 03:10:27,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:27,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:10:27,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:27,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:10:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:27,095 INFO L87 Difference]: Start difference. First operand 637 states and 1757 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:27,401 INFO L93 Difference]: Finished difference Result 724 states and 1951 transitions. [2022-02-10 03:10:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:10:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:27,402 INFO L225 Difference]: With dead ends: 724 [2022-02-10 03:10:27,402 INFO L226 Difference]: Without dead ends: 724 [2022-02-10 03:10:27,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:10:27,403 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:27,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 119 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 372 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-02-10 03:10:27,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-10 03:10:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 637. [2022-02-10 03:10:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.7625786163522013) internal successors, (1757), 636 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1757 transitions. [2022-02-10 03:10:27,409 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1757 transitions. Word has length 25 [2022-02-10 03:10:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:27,409 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1757 transitions. [2022-02-10 03:10:27,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1757 transitions. [2022-02-10 03:10:27,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:27,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:27,410 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:27,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-02-10 03:10:27,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:27,611 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:27,611 INFO L85 PathProgramCache]: Analyzing trace with hash -114530855, now seen corresponding path program 345 times [2022-02-10 03:10:27,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:27,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305727077] [2022-02-10 03:10:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:27,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:27,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:27,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305727077] [2022-02-10 03:10:27,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305727077] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:27,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513726035] [2022-02-10 03:10:27,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:27,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:27,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:27,741 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:27,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-02-10 03:10:27,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:10:27,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:27,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:27,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:27,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:27,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:27,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:27,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:27,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:27,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:28,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:28,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:28,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:28,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:28,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:28,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:28,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-02-10 03:10:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:28,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513726035] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:28,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:28,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:28,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330650102] [2022-02-10 03:10:28,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:28,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:28,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:28,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:28,317 INFO L87 Difference]: Start difference. First operand 637 states and 1757 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:28,584 INFO L93 Difference]: Finished difference Result 745 states and 1998 transitions. [2022-02-10 03:10:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:10:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:28,585 INFO L225 Difference]: With dead ends: 745 [2022-02-10 03:10:28,585 INFO L226 Difference]: Without dead ends: 745 [2022-02-10 03:10:28,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:10:28,585 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:28,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 156 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 460 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-02-10 03:10:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-02-10 03:10:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 642. [2022-02-10 03:10:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.7737909516380657) internal successors, (1778), 641 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1778 transitions. [2022-02-10 03:10:28,592 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1778 transitions. Word has length 25 [2022-02-10 03:10:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:28,593 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1778 transitions. [2022-02-10 03:10:28,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1778 transitions. [2022-02-10 03:10:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:28,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:28,593 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:28,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-02-10 03:10:28,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2022-02-10 03:10:28,794 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:28,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:28,794 INFO L85 PathProgramCache]: Analyzing trace with hash -262064129, now seen corresponding path program 346 times [2022-02-10 03:10:28,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:28,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881806479] [2022-02-10 03:10:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:28,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:28,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:28,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881806479] [2022-02-10 03:10:28,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881806479] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:28,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683476164] [2022-02-10 03:10:28,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:28,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:28,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:28,921 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:28,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-02-10 03:10:28,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:29,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:29,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:29,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:29,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2022-02-10 03:10:29,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:29,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-02-10 03:10:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:29,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:29,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:29,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:29,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:29,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:29,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:29,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:29,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683476164] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:29,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:29,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:10:29,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420273990] [2022-02-10 03:10:29,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:29,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:10:29,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:10:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:29,520 INFO L87 Difference]: Start difference. First operand 642 states and 1778 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:29,648 INFO L93 Difference]: Finished difference Result 674 states and 1848 transitions. [2022-02-10 03:10:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:29,648 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:29,649 INFO L225 Difference]: With dead ends: 674 [2022-02-10 03:10:29,649 INFO L226 Difference]: Without dead ends: 666 [2022-02-10 03:10:29,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:29,650 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:29,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 82 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 272 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-02-10 03:10:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-02-10 03:10:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 636. [2022-02-10 03:10:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.7606299212598424) internal successors, (1753), 635 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1753 transitions. [2022-02-10 03:10:29,656 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1753 transitions. Word has length 25 [2022-02-10 03:10:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:29,656 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1753 transitions. [2022-02-10 03:10:29,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1753 transitions. [2022-02-10 03:10:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:29,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:29,657 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:29,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-02-10 03:10:29,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-02-10 03:10:29,857 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:29,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2072099713, now seen corresponding path program 347 times [2022-02-10 03:10:29,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:29,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188545950] [2022-02-10 03:10:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:29,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:29,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:29,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188545950] [2022-02-10 03:10:29,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188545950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:29,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066736443] [2022-02-10 03:10:29,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:29,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:29,991 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:29,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-02-10 03:10:30,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-10 03:10:30,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:30,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:30,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:30,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:30,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:30,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:30,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:30,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:30,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:30,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:30,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:10:30,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:30,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:30,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:30,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:10:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:30,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066736443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:30,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:30,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:30,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026520787] [2022-02-10 03:10:30,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:30,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:30,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:30,587 INFO L87 Difference]: Start difference. First operand 636 states and 1753 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:30,801 INFO L93 Difference]: Finished difference Result 698 states and 1896 transitions. [2022-02-10 03:10:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:30,801 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:30,802 INFO L225 Difference]: With dead ends: 698 [2022-02-10 03:10:30,802 INFO L226 Difference]: Without dead ends: 698 [2022-02-10 03:10:30,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:10:30,802 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:30,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 122 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 339 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-02-10 03:10:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-10 03:10:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 640. [2022-02-10 03:10:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.7683881064162756) internal successors, (1769), 639 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1769 transitions. [2022-02-10 03:10:30,809 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1769 transitions. Word has length 25 [2022-02-10 03:10:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:30,809 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1769 transitions. [2022-02-10 03:10:30,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1769 transitions. [2022-02-10 03:10:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:30,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:30,810 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:30,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-02-10 03:10:31,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-02-10 03:10:31,010 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash 139643621, now seen corresponding path program 348 times [2022-02-10 03:10:31,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:31,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470836733] [2022-02-10 03:10:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:31,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:31,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:31,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470836733] [2022-02-10 03:10:31,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470836733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:31,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039951322] [2022-02-10 03:10:31,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:31,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:31,142 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:31,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-02-10 03:10:31,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:10:31,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:31,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:31,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:31,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:31,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:31,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:31,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:31,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:31,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:31,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:31,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:31,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:31,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:31,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-02-10 03:10:31,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:31,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-02-10 03:10:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:31,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039951322] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:31,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:31,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:10:31,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989298872] [2022-02-10 03:10:31,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:31,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:10:31,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:31,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:10:31,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:10:31,632 INFO L87 Difference]: Start difference. First operand 640 states and 1769 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:31,948 INFO L93 Difference]: Finished difference Result 677 states and 1860 transitions. [2022-02-10 03:10:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:10:31,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:31,949 INFO L225 Difference]: With dead ends: 677 [2022-02-10 03:10:31,949 INFO L226 Difference]: Without dead ends: 669 [2022-02-10 03:10:31,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:10:31,950 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:31,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 91 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 369 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-02-10 03:10:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-10 03:10:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 641. [2022-02-10 03:10:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.76875) internal successors, (1772), 640 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1772 transitions. [2022-02-10 03:10:31,956 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1772 transitions. Word has length 25 [2022-02-10 03:10:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:31,956 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1772 transitions. [2022-02-10 03:10:31,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1772 transitions. [2022-02-10 03:10:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:31,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:31,957 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:31,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-02-10 03:10:32,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-02-10 03:10:32,157 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:32,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1927605853, now seen corresponding path program 349 times [2022-02-10 03:10:32,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:32,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400901125] [2022-02-10 03:10:32,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:32,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:32,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:32,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400901125] [2022-02-10 03:10:32,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400901125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:32,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831081883] [2022-02-10 03:10:32,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:32,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:32,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:32,303 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:32,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-02-10 03:10:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:32,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:32,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:32,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:32,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:32,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:32,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:32,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:32,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:32,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:32,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:10:32,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:32,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:32,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:32,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:10:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:32,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831081883] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:32,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:32,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:32,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874114125] [2022-02-10 03:10:32,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:32,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:32,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:32,851 INFO L87 Difference]: Start difference. First operand 641 states and 1772 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:33,192 INFO L93 Difference]: Finished difference Result 698 states and 1909 transitions. [2022-02-10 03:10:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:33,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:33,193 INFO L225 Difference]: With dead ends: 698 [2022-02-10 03:10:33,193 INFO L226 Difference]: Without dead ends: 698 [2022-02-10 03:10:33,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:10:33,194 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:33,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 113 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 410 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-02-10 03:10:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-10 03:10:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 638. [2022-02-10 03:10:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7645211930926217) internal successors, (1761), 637 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1761 transitions. [2022-02-10 03:10:33,200 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1761 transitions. Word has length 25 [2022-02-10 03:10:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:33,200 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1761 transitions. [2022-02-10 03:10:33,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1761 transitions. [2022-02-10 03:10:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:33,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:33,201 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:33,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-02-10 03:10:33,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-02-10 03:10:33,402 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:33,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1977820165, now seen corresponding path program 350 times [2022-02-10 03:10:33,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:33,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090622863] [2022-02-10 03:10:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:33,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:33,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:33,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090622863] [2022-02-10 03:10:33,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090622863] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:33,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460715409] [2022-02-10 03:10:33,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:33,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:33,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:33,518 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:33,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-02-10 03:10:33,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:33,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:33,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:33,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:33,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:33,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:33,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:10:33,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:33,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:10:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:33,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:33,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:33,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-10 03:10:34,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:34,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:10:34,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:34,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:10:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:34,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460715409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:34,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:34,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:10:34,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620464598] [2022-02-10 03:10:34,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:34,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:10:34,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:34,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:10:34,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:10:34,100 INFO L87 Difference]: Start difference. First operand 638 states and 1761 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:34,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:34,266 INFO L93 Difference]: Finished difference Result 664 states and 1818 transitions. [2022-02-10 03:10:34,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:34,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:34,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:34,268 INFO L225 Difference]: With dead ends: 664 [2022-02-10 03:10:34,268 INFO L226 Difference]: Without dead ends: 652 [2022-02-10 03:10:34,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:34,268 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:34,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 101 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-02-10 03:10:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-02-10 03:10:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 637. [2022-02-10 03:10:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.761006289308176) internal successors, (1756), 636 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1756 transitions. [2022-02-10 03:10:34,274 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1756 transitions. Word has length 25 [2022-02-10 03:10:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:34,274 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1756 transitions. [2022-02-10 03:10:34,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1756 transitions. [2022-02-10 03:10:34,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:34,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:34,275 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:34,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Ended with exit code 0 [2022-02-10 03:10:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2022-02-10 03:10:34,475 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1638076665, now seen corresponding path program 351 times [2022-02-10 03:10:34,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:34,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264181909] [2022-02-10 03:10:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:34,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:34,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:34,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264181909] [2022-02-10 03:10:34,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264181909] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:34,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781078899] [2022-02-10 03:10:34,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:34,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:34,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:34,628 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:34,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-02-10 03:10:34,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:10:34,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:34,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:34,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:34,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:34,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:34,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:10:34,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:34,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:10:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:34,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:35,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:35,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:10:35,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:35,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:35,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:35,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:10:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:35,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781078899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:35,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:35,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:10:35,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238790902] [2022-02-10 03:10:35,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:35,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:10:35,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:10:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:35,201 INFO L87 Difference]: Start difference. First operand 637 states and 1756 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:35,476 INFO L93 Difference]: Finished difference Result 673 states and 1848 transitions. [2022-02-10 03:10:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:35,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:35,477 INFO L225 Difference]: With dead ends: 673 [2022-02-10 03:10:35,477 INFO L226 Difference]: Without dead ends: 673 [2022-02-10 03:10:35,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:10:35,477 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:35,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 59 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 225 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-02-10 03:10:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-02-10 03:10:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 636. [2022-02-10 03:10:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.7606299212598424) internal successors, (1753), 635 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1753 transitions. [2022-02-10 03:10:35,483 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1753 transitions. Word has length 25 [2022-02-10 03:10:35,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:35,483 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1753 transitions. [2022-02-10 03:10:35,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1753 transitions. [2022-02-10 03:10:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:35,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:35,484 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:35,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-02-10 03:10:35,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-02-10 03:10:35,685 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:35,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2080176873, now seen corresponding path program 352 times [2022-02-10 03:10:35,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:35,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369748063] [2022-02-10 03:10:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:35,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:35,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:35,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369748063] [2022-02-10 03:10:35,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369748063] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:35,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875151633] [2022-02-10 03:10:35,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:35,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:35,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:35,790 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:35,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-02-10 03:10:35,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:35,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:35,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:35,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:35,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:10:36,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:10:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:36,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:36,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:36,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:36,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:36,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:36,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:36,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:10:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:36,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875151633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:36,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:36,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:36,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342214208] [2022-02-10 03:10:36,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:36,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:36,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:36,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:36,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:36,227 INFO L87 Difference]: Start difference. First operand 636 states and 1753 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:36,597 INFO L93 Difference]: Finished difference Result 691 states and 1901 transitions. [2022-02-10 03:10:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:36,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:36,598 INFO L225 Difference]: With dead ends: 691 [2022-02-10 03:10:36,598 INFO L226 Difference]: Without dead ends: 691 [2022-02-10 03:10:36,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:10:36,598 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:36,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:10:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-10 03:10:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 640. [2022-02-10 03:10:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.763693270735524) internal successors, (1766), 639 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1766 transitions. [2022-02-10 03:10:36,605 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1766 transitions. Word has length 25 [2022-02-10 03:10:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:36,605 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1766 transitions. [2022-02-10 03:10:36,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1766 transitions. [2022-02-10 03:10:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:36,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:36,606 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:36,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-02-10 03:10:36,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2022-02-10 03:10:36,806 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1784915143, now seen corresponding path program 353 times [2022-02-10 03:10:36,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:36,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402213797] [2022-02-10 03:10:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:36,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:36,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:36,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402213797] [2022-02-10 03:10:36,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402213797] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:36,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012598272] [2022-02-10 03:10:36,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:36,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:36,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:36,920 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:36,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-02-10 03:10:36,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:10:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:37,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:37,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:37,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:37,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:37,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:37,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:10:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:37,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:37,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:37,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:37,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:37,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:37,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:37,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:10:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:37,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012598272] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:37,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:37,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:10:37,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411151628] [2022-02-10 03:10:37,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:37,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:10:37,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:10:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:37,494 INFO L87 Difference]: Start difference. First operand 640 states and 1766 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:37,796 INFO L93 Difference]: Finished difference Result 708 states and 1924 transitions. [2022-02-10 03:10:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:10:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:37,797 INFO L225 Difference]: With dead ends: 708 [2022-02-10 03:10:37,797 INFO L226 Difference]: Without dead ends: 708 [2022-02-10 03:10:37,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:10:37,798 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:37,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 108 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 381 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2022-02-10 03:10:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-10 03:10:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 640. [2022-02-10 03:10:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.763693270735524) internal successors, (1766), 639 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1766 transitions. [2022-02-10 03:10:37,804 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1766 transitions. Word has length 25 [2022-02-10 03:10:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:37,805 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1766 transitions. [2022-02-10 03:10:37,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1766 transitions. [2022-02-10 03:10:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:37,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:37,805 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:37,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-02-10 03:10:38,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:38,006 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash -604282497, now seen corresponding path program 354 times [2022-02-10 03:10:38,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:38,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632903069] [2022-02-10 03:10:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:38,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:38,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:38,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632903069] [2022-02-10 03:10:38,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632903069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:38,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324078676] [2022-02-10 03:10:38,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:38,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:38,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:38,119 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:38,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-02-10 03:10:38,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:10:38,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:38,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:38,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:38,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:38,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:38,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:38,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:38,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:38,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:10:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:38,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:38,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:38,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:38,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:38,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:38,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:38,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:10:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:38,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324078676] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:38,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:38,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:38,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104346545] [2022-02-10 03:10:38,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:38,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:38,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:38,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:38,644 INFO L87 Difference]: Start difference. First operand 640 states and 1766 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:38,722 INFO L93 Difference]: Finished difference Result 700 states and 1930 transitions. [2022-02-10 03:10:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:10:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:38,723 INFO L225 Difference]: With dead ends: 700 [2022-02-10 03:10:38,723 INFO L226 Difference]: Without dead ends: 700 [2022-02-10 03:10:38,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:38,723 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:38,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-02-10 03:10:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-02-10 03:10:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 640. [2022-02-10 03:10:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.763693270735524) internal successors, (1766), 639 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1766 transitions. [2022-02-10 03:10:38,730 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1766 transitions. Word has length 25 [2022-02-10 03:10:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:38,730 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1766 transitions. [2022-02-10 03:10:38,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1766 transitions. [2022-02-10 03:10:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:38,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:38,731 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:38,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-02-10 03:10:38,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:38,932 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:38,932 INFO L85 PathProgramCache]: Analyzing trace with hash -959847293, now seen corresponding path program 355 times [2022-02-10 03:10:38,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:38,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939857497] [2022-02-10 03:10:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:38,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:39,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:39,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939857497] [2022-02-10 03:10:39,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939857497] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:39,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095342608] [2022-02-10 03:10:39,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:39,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:39,034 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:39,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-02-10 03:10:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:39,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:39,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:39,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:10:39,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-10 03:10:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:39,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:39,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:39,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:39,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:39,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:39,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:39,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:10:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:39,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095342608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:39,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:39,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:10:39,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735298442] [2022-02-10 03:10:39,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:39,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:10:39,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:10:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:39,505 INFO L87 Difference]: Start difference. First operand 640 states and 1766 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:39,849 INFO L93 Difference]: Finished difference Result 724 states and 1966 transitions. [2022-02-10 03:10:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:10:39,850 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:39,851 INFO L225 Difference]: With dead ends: 724 [2022-02-10 03:10:39,851 INFO L226 Difference]: Without dead ends: 716 [2022-02-10 03:10:39,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:10:39,851 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:39,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 101 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 383 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-02-10 03:10:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-02-10 03:10:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 654. [2022-02-10 03:10:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.7580398162327717) internal successors, (1801), 653 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1801 transitions. [2022-02-10 03:10:39,858 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1801 transitions. Word has length 25 [2022-02-10 03:10:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:39,858 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1801 transitions. [2022-02-10 03:10:39,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1801 transitions. [2022-02-10 03:10:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:39,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:39,859 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:39,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-02-10 03:10:40,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:40,059 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1525084419, now seen corresponding path program 356 times [2022-02-10 03:10:40,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:40,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115450785] [2022-02-10 03:10:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:40,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:40,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:40,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115450785] [2022-02-10 03:10:40,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115450785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:40,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837715636] [2022-02-10 03:10:40,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:40,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:40,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:40,186 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:40,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-02-10 03:10:40,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:40,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:40,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:40,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:40,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:10:40,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:40,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-02-10 03:10:40,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:40,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-02-10 03:10:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:40,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:40,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:40,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:40,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:40,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:40,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:40,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:40,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837715636] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:40,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:40,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:40,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662105286] [2022-02-10 03:10:40,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:40,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:40,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:40,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:40,936 INFO L87 Difference]: Start difference. First operand 654 states and 1801 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:41,072 INFO L93 Difference]: Finished difference Result 716 states and 1956 transitions. [2022-02-10 03:10:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:10:41,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:41,073 INFO L225 Difference]: With dead ends: 716 [2022-02-10 03:10:41,073 INFO L226 Difference]: Without dead ends: 716 [2022-02-10 03:10:41,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:41,073 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:41,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 124 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 289 Invalid, 0 Unknown, 189 Unchecked, 0.1s Time] [2022-02-10 03:10:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-02-10 03:10:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 657. [2022-02-10 03:10:41,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.7591463414634148) internal successors, (1810), 656 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1810 transitions. [2022-02-10 03:10:41,080 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1810 transitions. Word has length 25 [2022-02-10 03:10:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:41,080 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1810 transitions. [2022-02-10 03:10:41,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1810 transitions. [2022-02-10 03:10:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:41,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:41,081 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:41,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-02-10 03:10:41,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:41,281 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:41,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:41,282 INFO L85 PathProgramCache]: Analyzing trace with hash -125719545, now seen corresponding path program 357 times [2022-02-10 03:10:41,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:41,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685335378] [2022-02-10 03:10:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:41,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:41,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:41,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685335378] [2022-02-10 03:10:41,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685335378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:41,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259424349] [2022-02-10 03:10:41,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:41,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:41,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:41,396 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:41,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-02-10 03:10:41,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:10:41,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:41,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:41,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:41,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:41,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:41,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:10:41,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:41,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:10:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:41,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:41,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:41,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:41,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:41,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:41,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:41,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:10:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:41,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259424349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:41,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:41,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:41,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946174926] [2022-02-10 03:10:41,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:41,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:41,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:41,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:41,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:41,990 INFO L87 Difference]: Start difference. First operand 657 states and 1810 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:42,184 INFO L93 Difference]: Finished difference Result 730 states and 1978 transitions. [2022-02-10 03:10:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:42,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:42,186 INFO L225 Difference]: With dead ends: 730 [2022-02-10 03:10:42,186 INFO L226 Difference]: Without dead ends: 730 [2022-02-10 03:10:42,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:10:42,186 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:42,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 138 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 357 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-02-10 03:10:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-02-10 03:10:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 660. [2022-02-10 03:10:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.7663125948406675) internal successors, (1823), 659 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1823 transitions. [2022-02-10 03:10:42,193 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1823 transitions. Word has length 25 [2022-02-10 03:10:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:42,193 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1823 transitions. [2022-02-10 03:10:42,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1823 transitions. [2022-02-10 03:10:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:42,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:42,194 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:42,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-02-10 03:10:42,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:42,394 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2067533947, now seen corresponding path program 358 times [2022-02-10 03:10:42,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:42,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076390682] [2022-02-10 03:10:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:42,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:42,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:42,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076390682] [2022-02-10 03:10:42,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076390682] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:42,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819338857] [2022-02-10 03:10:42,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:42,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:42,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:42,505 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:42,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-02-10 03:10:42,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:42,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:42,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:42,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:42,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:42,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:42,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:10:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:42,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2022-02-10 03:10:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:42,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:43,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:43,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:43,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:43,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:43,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:43,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:43,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819338857] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:43,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:43,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:10:43,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975102591] [2022-02-10 03:10:43,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:43,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:10:43,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:10:43,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:10:43,129 INFO L87 Difference]: Start difference. First operand 660 states and 1823 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:43,211 INFO L93 Difference]: Finished difference Result 699 states and 1914 transitions. [2022-02-10 03:10:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:10:43,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:43,212 INFO L225 Difference]: With dead ends: 699 [2022-02-10 03:10:43,212 INFO L226 Difference]: Without dead ends: 693 [2022-02-10 03:10:43,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:43,212 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:43,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 68 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-02-10 03:10:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-02-10 03:10:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 650. [2022-02-10 03:10:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.7550077041602465) internal successors, (1788), 649 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1788 transitions. [2022-02-10 03:10:43,219 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1788 transitions. Word has length 25 [2022-02-10 03:10:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:43,219 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1788 transitions. [2022-02-10 03:10:43,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1788 transitions. [2022-02-10 03:10:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:43,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:43,220 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:43,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-02-10 03:10:43,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-02-10 03:10:43,420 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1375493057, now seen corresponding path program 359 times [2022-02-10 03:10:43,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:43,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882402501] [2022-02-10 03:10:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:43,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:43,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:43,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882402501] [2022-02-10 03:10:43,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882402501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:43,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696503360] [2022-02-10 03:10:43,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:43,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:43,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:43,537 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:43,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-02-10 03:10:43,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:10:43,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:43,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:43,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:43,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:43,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:43,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:43,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:43,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:43,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:43,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:44,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:44,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:44,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:44,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:44,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:44,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:10:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:44,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696503360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:44,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:44,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:10:44,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233236458] [2022-02-10 03:10:44,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:44,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:10:44,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:44,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:10:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:44,078 INFO L87 Difference]: Start difference. First operand 650 states and 1788 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:44,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:44,410 INFO L93 Difference]: Finished difference Result 749 states and 2006 transitions. [2022-02-10 03:10:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:10:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:44,412 INFO L225 Difference]: With dead ends: 749 [2022-02-10 03:10:44,412 INFO L226 Difference]: Without dead ends: 749 [2022-02-10 03:10:44,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:10:44,412 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:44,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 143 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-02-10 03:10:44,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-02-10 03:10:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 655. [2022-02-10 03:10:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.7660550458715596) internal successors, (1809), 654 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1809 transitions. [2022-02-10 03:10:44,419 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1809 transitions. Word has length 25 [2022-02-10 03:10:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:44,419 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1809 transitions. [2022-02-10 03:10:44,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:44,419 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1809 transitions. [2022-02-10 03:10:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:44,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:44,420 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:44,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-02-10 03:10:44,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-02-10 03:10:44,620 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:44,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1523026331, now seen corresponding path program 360 times [2022-02-10 03:10:44,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:44,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654597416] [2022-02-10 03:10:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:44,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:44,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:44,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654597416] [2022-02-10 03:10:44,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654597416] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:44,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354117396] [2022-02-10 03:10:44,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:44,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:44,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:44,730 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:44,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-02-10 03:10:44,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:10:44,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:44,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:44,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:44,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:44,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:44,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:44,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:44,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:45,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:45,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:45,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:45,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:45,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:45,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:45,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:45,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354117396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:45,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:45,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:10:45,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106778006] [2022-02-10 03:10:45,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:45,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:10:45,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:45,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:10:45,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:10:45,283 INFO L87 Difference]: Start difference. First operand 655 states and 1809 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:45,620 INFO L93 Difference]: Finished difference Result 732 states and 1969 transitions. [2022-02-10 03:10:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:10:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:45,621 INFO L225 Difference]: With dead ends: 732 [2022-02-10 03:10:45,621 INFO L226 Difference]: Without dead ends: 724 [2022-02-10 03:10:45,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:10:45,621 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:45,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 136 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 382 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-02-10 03:10:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-10 03:10:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 650. [2022-02-10 03:10:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.7550077041602465) internal successors, (1788), 649 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1788 transitions. [2022-02-10 03:10:45,628 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1788 transitions. Word has length 25 [2022-02-10 03:10:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:45,628 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1788 transitions. [2022-02-10 03:10:45,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1788 transitions. [2022-02-10 03:10:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:45,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:45,628 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:45,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-02-10 03:10:45,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-02-10 03:10:45,829 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:45,829 INFO L85 PathProgramCache]: Analyzing trace with hash 961905381, now seen corresponding path program 361 times [2022-02-10 03:10:45,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:45,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607642507] [2022-02-10 03:10:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:45,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:45,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:45,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607642507] [2022-02-10 03:10:45,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607642507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:45,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437122670] [2022-02-10 03:10:45,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:45,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:45,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:45,963 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:45,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-02-10 03:10:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:45,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:46,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:46,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:46,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:46,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:46,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:46,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:46,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:46,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:46,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:46,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:46,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:46,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:46,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:46,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437122670] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:46,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:46,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:10:46,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146210246] [2022-02-10 03:10:46,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:46,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:10:46,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:10:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:46,612 INFO L87 Difference]: Start difference. First operand 650 states and 1788 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:46,883 INFO L93 Difference]: Finished difference Result 724 states and 1964 transitions. [2022-02-10 03:10:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:46,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:46,884 INFO L225 Difference]: With dead ends: 724 [2022-02-10 03:10:46,884 INFO L226 Difference]: Without dead ends: 724 [2022-02-10 03:10:46,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:10:46,884 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:46,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 101 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 357 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-02-10 03:10:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-10 03:10:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 653. [2022-02-10 03:10:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.7607361963190185) internal successors, (1800), 652 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1800 transitions. [2022-02-10 03:10:46,891 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1800 transitions. Word has length 25 [2022-02-10 03:10:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:46,891 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1800 transitions. [2022-02-10 03:10:46,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1800 transitions. [2022-02-10 03:10:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:46,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:46,892 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:46,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-02-10 03:10:47,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:47,092 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1121318581, now seen corresponding path program 362 times [2022-02-10 03:10:47,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:47,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751349568] [2022-02-10 03:10:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:47,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:47,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:47,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751349568] [2022-02-10 03:10:47,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751349568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:47,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389183520] [2022-02-10 03:10:47,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:47,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:47,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:47,196 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:47,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-02-10 03:10:47,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:47,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:47,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:47,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:47,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:47,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:47,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:47,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:47,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:47,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:47,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:47,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:47,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:47,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:47,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:47,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389183520] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:47,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:47,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:10:47,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721441991] [2022-02-10 03:10:47,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:47,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:10:47,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:47,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:10:47,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:10:47,676 INFO L87 Difference]: Start difference. First operand 653 states and 1800 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:47,865 INFO L93 Difference]: Finished difference Result 701 states and 1924 transitions. [2022-02-10 03:10:47,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:10:47,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:47,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:47,866 INFO L225 Difference]: With dead ends: 701 [2022-02-10 03:10:47,866 INFO L226 Difference]: Without dead ends: 697 [2022-02-10 03:10:47,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:47,866 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:47,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 84 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 262 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2022-02-10 03:10:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-02-10 03:10:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 653. [2022-02-10 03:10:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.7592024539877302) internal successors, (1799), 652 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1799 transitions. [2022-02-10 03:10:47,873 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1799 transitions. Word has length 25 [2022-02-10 03:10:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:47,873 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1799 transitions. [2022-02-10 03:10:47,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1799 transitions. [2022-02-10 03:10:47,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:47,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:47,874 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:47,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-02-10 03:10:48,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:48,074 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash 666643651, now seen corresponding path program 363 times [2022-02-10 03:10:48,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:48,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729849643] [2022-02-10 03:10:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:48,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:48,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:48,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729849643] [2022-02-10 03:10:48,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729849643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:48,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377516541] [2022-02-10 03:10:48,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:48,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:48,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:48,216 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:48,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-02-10 03:10:48,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:10:48,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:48,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:48,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:48,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:48,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:48,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:48,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:48,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:48,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:48,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:48,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:48,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:48,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377516541] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:48,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:48,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:10:48,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697476938] [2022-02-10 03:10:48,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:48,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:10:48,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:10:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:48,843 INFO L87 Difference]: Start difference. First operand 653 states and 1799 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:49,031 INFO L93 Difference]: Finished difference Result 725 states and 1979 transitions. [2022-02-10 03:10:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:49,031 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:49,032 INFO L225 Difference]: With dead ends: 725 [2022-02-10 03:10:49,032 INFO L226 Difference]: Without dead ends: 725 [2022-02-10 03:10:49,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:49,032 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:49,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 117 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 352 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-02-10 03:10:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-02-10 03:10:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 648. [2022-02-10 03:10:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7573415765069553) internal successors, (1784), 647 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1784 transitions. [2022-02-10 03:10:49,039 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1784 transitions. Word has length 25 [2022-02-10 03:10:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:49,039 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1784 transitions. [2022-02-10 03:10:49,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1784 transitions. [2022-02-10 03:10:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:49,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:49,040 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:49,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-02-10 03:10:49,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:49,240 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:49,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1993883901, now seen corresponding path program 364 times [2022-02-10 03:10:49,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:49,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390790932] [2022-02-10 03:10:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:49,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:49,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:49,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390790932] [2022-02-10 03:10:49,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390790932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:49,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089967803] [2022-02-10 03:10:49,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:49,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:49,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:49,342 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:49,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-02-10 03:10:49,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:49,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:49,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:49,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:10:49,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:10:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:49,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:49,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:49,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:49,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:49,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:49,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:49,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:49,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089967803] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:49,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:49,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:10:49,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380801038] [2022-02-10 03:10:49,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:49,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:10:49,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:49,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:10:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:49,767 INFO L87 Difference]: Start difference. First operand 648 states and 1784 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:49,890 INFO L93 Difference]: Finished difference Result 689 states and 1905 transitions. [2022-02-10 03:10:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:10:49,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:49,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:49,891 INFO L225 Difference]: With dead ends: 689 [2022-02-10 03:10:49,891 INFO L226 Difference]: Without dead ends: 689 [2022-02-10 03:10:49,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:49,891 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:49,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 91 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 326 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-02-10 03:10:49,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-02-10 03:10:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 640. [2022-02-10 03:10:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.7668231611893583) internal successors, (1768), 639 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1768 transitions. [2022-02-10 03:10:49,898 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1768 transitions. Word has length 25 [2022-02-10 03:10:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:49,898 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1768 transitions. [2022-02-10 03:10:49,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1768 transitions. [2022-02-10 03:10:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:49,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:49,899 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:49,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-02-10 03:10:50,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:50,099 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash 135483015, now seen corresponding path program 365 times [2022-02-10 03:10:50,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:50,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190610037] [2022-02-10 03:10:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:50,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:50,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:50,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190610037] [2022-02-10 03:10:50,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190610037] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:50,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496108431] [2022-02-10 03:10:50,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:50,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:50,207 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:50,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-02-10 03:10:50,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:10:50,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:50,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:50,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:50,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:10:50,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:10:50,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:10:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:50,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:50,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:50,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:10:50,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:50,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:50,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:50,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:50,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496108431] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:50,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:50,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:10:50,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560503452] [2022-02-10 03:10:50,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:50,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:10:50,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:50,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:10:50,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:10:50,715 INFO L87 Difference]: Start difference. First operand 640 states and 1768 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:50,930 INFO L93 Difference]: Finished difference Result 708 states and 1935 transitions. [2022-02-10 03:10:50,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:10:50,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:50,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:50,931 INFO L225 Difference]: With dead ends: 708 [2022-02-10 03:10:50,931 INFO L226 Difference]: Without dead ends: 708 [2022-02-10 03:10:50,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:50,931 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:50,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 128 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 434 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-02-10 03:10:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-10 03:10:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 639. [2022-02-10 03:10:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.774294670846395) internal successors, (1770), 638 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1770 transitions. [2022-02-10 03:10:50,938 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1770 transitions. Word has length 25 [2022-02-10 03:10:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:50,938 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1770 transitions. [2022-02-10 03:10:50,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1770 transitions. [2022-02-10 03:10:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:50,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:50,939 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:50,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-02-10 03:10:51,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable372 [2022-02-10 03:10:51,139 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1515320949, now seen corresponding path program 366 times [2022-02-10 03:10:51,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:51,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988639174] [2022-02-10 03:10:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:51,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:51,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:51,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988639174] [2022-02-10 03:10:51,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988639174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:51,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775325121] [2022-02-10 03:10:51,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:51,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:51,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:51,256 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:51,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-02-10 03:10:51,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:10:51,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:51,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:51,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:10:51,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:10:51,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:10:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:51,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:51,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:51,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:51,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:51,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:51,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:51,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:51,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775325121] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:51,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:51,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:10:51,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406349449] [2022-02-10 03:10:51,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:51,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:10:51,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:51,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:10:51,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:10:51,691 INFO L87 Difference]: Start difference. First operand 639 states and 1770 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:51,957 INFO L93 Difference]: Finished difference Result 762 states and 2049 transitions. [2022-02-10 03:10:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:10:51,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:51,959 INFO L225 Difference]: With dead ends: 762 [2022-02-10 03:10:51,959 INFO L226 Difference]: Without dead ends: 762 [2022-02-10 03:10:51,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:10:51,959 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:51,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 108 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 368 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-02-10 03:10:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-02-10 03:10:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 643. [2022-02-10 03:10:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.783489096573209) internal successors, (1787), 642 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1787 transitions. [2022-02-10 03:10:51,966 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1787 transitions. Word has length 25 [2022-02-10 03:10:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:51,966 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1787 transitions. [2022-02-10 03:10:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1787 transitions. [2022-02-10 03:10:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:51,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:51,967 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:51,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Ended with exit code 0 [2022-02-10 03:10:52,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:52,167 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:52,168 INFO L85 PathProgramCache]: Analyzing trace with hash 677932543, now seen corresponding path program 367 times [2022-02-10 03:10:52,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:52,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084588762] [2022-02-10 03:10:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:52,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:52,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:52,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084588762] [2022-02-10 03:10:52,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084588762] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:52,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710982868] [2022-02-10 03:10:52,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:52,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:52,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:52,278 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:52,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-02-10 03:10:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:52,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:52,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:52,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:10:52,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-02-10 03:10:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:52,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:52,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:52,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:10:52,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:52,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:52,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:52,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:10:52,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710982868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:52,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:52,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:10:52,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466717450] [2022-02-10 03:10:52,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:52,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:10:52,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:10:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:10:52,776 INFO L87 Difference]: Start difference. First operand 643 states and 1787 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:53,005 INFO L93 Difference]: Finished difference Result 712 states and 1927 transitions. [2022-02-10 03:10:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:10:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:53,007 INFO L225 Difference]: With dead ends: 712 [2022-02-10 03:10:53,007 INFO L226 Difference]: Without dead ends: 704 [2022-02-10 03:10:53,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:10:53,007 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:53,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 94 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 389 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-02-10 03:10:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-02-10 03:10:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 639. [2022-02-10 03:10:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.7554858934169277) internal successors, (1758), 638 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1758 transitions. [2022-02-10 03:10:53,014 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1758 transitions. Word has length 25 [2022-02-10 03:10:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:53,014 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1758 transitions. [2022-02-10 03:10:53,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1758 transitions. [2022-02-10 03:10:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:53,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:53,014 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:53,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-02-10 03:10:53,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:53,215 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:53,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:53,215 INFO L85 PathProgramCache]: Analyzing trace with hash 271894215, now seen corresponding path program 368 times [2022-02-10 03:10:53,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:53,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464467791] [2022-02-10 03:10:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:53,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:53,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:53,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464467791] [2022-02-10 03:10:53,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464467791] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:53,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604297576] [2022-02-10 03:10:53,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:53,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:53,300 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:53,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-02-10 03:10:53,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:53,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:53,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:53,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:53,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-10 03:10:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:53,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:53,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:53,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:53,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:53,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:53,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:53,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:10:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:53,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604297576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:53,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:53,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:10:53,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630816564] [2022-02-10 03:10:53,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:53,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:10:53,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:53,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:10:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:10:53,636 INFO L87 Difference]: Start difference. First operand 639 states and 1758 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:53,827 INFO L93 Difference]: Finished difference Result 684 states and 1879 transitions. [2022-02-10 03:10:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:10:53,827 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:53,828 INFO L225 Difference]: With dead ends: 684 [2022-02-10 03:10:53,828 INFO L226 Difference]: Without dead ends: 684 [2022-02-10 03:10:53,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:53,829 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:53,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 100 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:10:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-02-10 03:10:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 634. [2022-02-10 03:10:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.7630331753554502) internal successors, (1749), 633 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1749 transitions. [2022-02-10 03:10:53,835 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1749 transitions. Word has length 25 [2022-02-10 03:10:53,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:53,835 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1749 transitions. [2022-02-10 03:10:53,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1749 transitions. [2022-02-10 03:10:53,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:53,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:53,836 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:53,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2022-02-10 03:10:54,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-02-10 03:10:54,036 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:54,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash 600534791, now seen corresponding path program 369 times [2022-02-10 03:10:54,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:54,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690970410] [2022-02-10 03:10:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:54,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:54,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:54,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690970410] [2022-02-10 03:10:54,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690970410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:54,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753141230] [2022-02-10 03:10:54,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:10:54,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:54,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:54,130 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:54,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-02-10 03:10:54,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:10:54,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:54,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:54,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:54,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:10:54,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:10:54,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:10:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:54,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:54,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:54,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:10:54,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:54,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:54,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:54,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:54,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753141230] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:54,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:54,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:10:54,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304700777] [2022-02-10 03:10:54,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:54,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:10:54,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:54,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:10:54,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:10:54,523 INFO L87 Difference]: Start difference. First operand 634 states and 1749 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:54,768 INFO L93 Difference]: Finished difference Result 908 states and 2367 transitions. [2022-02-10 03:10:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:10:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:54,769 INFO L225 Difference]: With dead ends: 908 [2022-02-10 03:10:54,769 INFO L226 Difference]: Without dead ends: 908 [2022-02-10 03:10:54,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:10:54,770 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 89 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:54,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 119 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:10:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-02-10 03:10:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 643. [2022-02-10 03:10:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.778816199376947) internal successors, (1784), 642 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1784 transitions. [2022-02-10 03:10:54,777 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1784 transitions. Word has length 25 [2022-02-10 03:10:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:54,777 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1784 transitions. [2022-02-10 03:10:54,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1784 transitions. [2022-02-10 03:10:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:54,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:54,778 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:54,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-02-10 03:10:54,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-02-10 03:10:54,978 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1402272391, now seen corresponding path program 370 times [2022-02-10 03:10:54,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:54,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855322678] [2022-02-10 03:10:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:54,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:55,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:55,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855322678] [2022-02-10 03:10:55,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855322678] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:55,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835967712] [2022-02-10 03:10:55,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:10:55,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:55,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:55,083 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:55,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-02-10 03:10:55,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:10:55,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:55,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:55,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-10 03:10:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:55,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:55,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:55,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-10 03:10:55,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:55,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:10:55,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:55,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:10:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:55,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835967712] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:55,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:55,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:10:55,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274637982] [2022-02-10 03:10:55,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:55,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:10:55,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:55,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:10:55,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:10:55,396 INFO L87 Difference]: Start difference. First operand 643 states and 1784 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:55,604 INFO L93 Difference]: Finished difference Result 761 states and 2041 transitions. [2022-02-10 03:10:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:10:55,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:55,605 INFO L225 Difference]: With dead ends: 761 [2022-02-10 03:10:55,605 INFO L226 Difference]: Without dead ends: 743 [2022-02-10 03:10:55,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:55,606 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:55,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 85 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:10:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-02-10 03:10:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 645. [2022-02-10 03:10:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.768633540372671) internal successors, (1783), 644 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1783 transitions. [2022-02-10 03:10:55,612 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1783 transitions. Word has length 25 [2022-02-10 03:10:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:55,612 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1783 transitions. [2022-02-10 03:10:55,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1783 transitions. [2022-02-10 03:10:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:55,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:55,613 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:55,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-02-10 03:10:55,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-02-10 03:10:55,813 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash 346745667, now seen corresponding path program 371 times [2022-02-10 03:10:55,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:55,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685679520] [2022-02-10 03:10:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:55,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:55,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:55,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685679520] [2022-02-10 03:10:55,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685679520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:55,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624070794] [2022-02-10 03:10:55,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:10:55,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:55,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:55,901 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:55,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-02-10 03:10:55,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:10:55,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:55,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:10:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:56,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:10:56,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:10:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:56,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:56,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:56,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:10:56,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:56,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:56,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:56,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:56,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624070794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:56,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:56,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:10:56,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690338810] [2022-02-10 03:10:56,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:56,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:10:56,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:10:56,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:10:56,254 INFO L87 Difference]: Start difference. First operand 645 states and 1783 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:56,504 INFO L93 Difference]: Finished difference Result 876 states and 2314 transitions. [2022-02-10 03:10:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:10:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:56,506 INFO L225 Difference]: With dead ends: 876 [2022-02-10 03:10:56,506 INFO L226 Difference]: Without dead ends: 876 [2022-02-10 03:10:56,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:10:56,506 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:56,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 200 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:10:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-02-10 03:10:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 634. [2022-02-10 03:10:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.7630331753554502) internal successors, (1749), 633 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1749 transitions. [2022-02-10 03:10:56,513 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1749 transitions. Word has length 25 [2022-02-10 03:10:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:56,513 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1749 transitions. [2022-02-10 03:10:56,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1749 transitions. [2022-02-10 03:10:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:56,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:56,514 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:56,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Ended with exit code 0 [2022-02-10 03:10:56,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-02-10 03:10:56,714 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:56,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1468298025, now seen corresponding path program 372 times [2022-02-10 03:10:56,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:56,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996029265] [2022-02-10 03:10:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:56,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:56,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:56,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996029265] [2022-02-10 03:10:56,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996029265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:56,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329185648] [2022-02-10 03:10:56,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:10:56,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:56,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:56,845 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:56,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-02-10 03:10:56,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:10:56,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:56,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:56,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:56,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:57,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:57,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:57,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:57,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:57,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:57,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:57,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:10:57,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:57,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:57,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:57,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:57,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329185648] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:57,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:57,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:10:57,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174300883] [2022-02-10 03:10:57,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:57,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:10:57,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:10:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:10:57,734 INFO L87 Difference]: Start difference. First operand 634 states and 1749 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:57,909 INFO L93 Difference]: Finished difference Result 709 states and 1929 transitions. [2022-02-10 03:10:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:10:57,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:57,910 INFO L225 Difference]: With dead ends: 709 [2022-02-10 03:10:57,910 INFO L226 Difference]: Without dead ends: 709 [2022-02-10 03:10:57,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:10:57,910 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:57,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 98 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 334 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-02-10 03:10:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-02-10 03:10:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 638. [2022-02-10 03:10:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.7645211930926217) internal successors, (1761), 637 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1761 transitions. [2022-02-10 03:10:57,917 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1761 transitions. Word has length 25 [2022-02-10 03:10:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:57,917 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1761 transitions. [2022-02-10 03:10:57,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1761 transitions. [2022-02-10 03:10:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:57,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:57,917 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:57,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Forceful destruction successful, exit code 0 [2022-02-10 03:10:58,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2022-02-10 03:10:58,118 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:58,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1173036295, now seen corresponding path program 373 times [2022-02-10 03:10:58,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:58,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932025868] [2022-02-10 03:10:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:58,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:58,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:58,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932025868] [2022-02-10 03:10:58,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932025868] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:58,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894685067] [2022-02-10 03:10:58,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:10:58,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:58,227 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:58,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-02-10 03:10:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:58,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:10:58,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:58,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:10:58,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:58,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:10:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:58,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:10:59,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:59,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:10:59,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:59,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:10:59,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:10:59,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:10:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:59,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894685067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:10:59,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:10:59,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:10:59,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773163082] [2022-02-10 03:10:59,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:10:59,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:10:59,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:10:59,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:10:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:10:59,108 INFO L87 Difference]: Start difference. First operand 638 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:10:59,212 INFO L93 Difference]: Finished difference Result 713 states and 1950 transitions. [2022-02-10 03:10:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:10:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:10:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:10:59,213 INFO L225 Difference]: With dead ends: 713 [2022-02-10 03:10:59,213 INFO L226 Difference]: Without dead ends: 713 [2022-02-10 03:10:59,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:10:59,213 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:10:59,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 112 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 253 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-02-10 03:10:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-02-10 03:10:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 634. [2022-02-10 03:10:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.7630331753554502) internal successors, (1749), 633 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1749 transitions. [2022-02-10 03:10:59,220 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1749 transitions. Word has length 25 [2022-02-10 03:10:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:10:59,220 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1749 transitions. [2022-02-10 03:10:59,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:10:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1749 transitions. [2022-02-10 03:10:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:10:59,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:10:59,221 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:10:59,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Ended with exit code 0 [2022-02-10 03:10:59,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2022-02-10 03:10:59,421 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:10:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:10:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1146377509, now seen corresponding path program 374 times [2022-02-10 03:10:59,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:10:59,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530772117] [2022-02-10 03:10:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:10:59,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:10:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:10:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:10:59,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:10:59,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530772117] [2022-02-10 03:10:59,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530772117] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:10:59,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72888117] [2022-02-10 03:10:59,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:10:59,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:10:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:10:59,548 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:10:59,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-02-10 03:10:59,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:10:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:10:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:10:59,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:10:59,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:10:59,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:00,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:00,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:11:00,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:00,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:11:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:00,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:00,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:00,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:00,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:00,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:00,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:00,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:00,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72888117] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:00,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:00,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:11:00,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937994270] [2022-02-10 03:11:00,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:00,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:11:00,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:00,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:11:00,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:00,431 INFO L87 Difference]: Start difference. First operand 634 states and 1749 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:00,508 INFO L93 Difference]: Finished difference Result 719 states and 1986 transitions. [2022-02-10 03:11:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:11:00,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:00,510 INFO L225 Difference]: With dead ends: 719 [2022-02-10 03:11:00,510 INFO L226 Difference]: Without dead ends: 719 [2022-02-10 03:11:00,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:00,510 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:00,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 112 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-02-10 03:11:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-02-10 03:11:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 638. [2022-02-10 03:11:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.772370486656201) internal successors, (1766), 637 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1766 transitions. [2022-02-10 03:11:00,516 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1766 transitions. Word has length 25 [2022-02-10 03:11:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:00,516 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1766 transitions. [2022-02-10 03:11:00,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1766 transitions. [2022-02-10 03:11:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:00,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:00,517 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:00,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:00,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2022-02-10 03:11:00,718 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash 551358569, now seen corresponding path program 375 times [2022-02-10 03:11:00,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:00,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307158839] [2022-02-10 03:11:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:00,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:00,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:00,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307158839] [2022-02-10 03:11:00,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307158839] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:00,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850582535] [2022-02-10 03:11:00,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:11:00,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:00,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:00,821 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:00,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-02-10 03:11:00,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:11:00,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:00,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:11:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:00,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:00,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:01,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:01,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:11:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:01,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:01,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:01,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:01,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:01,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:01,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:01,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:01,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850582535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:01,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:01,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 03:11:01,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452200831] [2022-02-10 03:11:01,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:01,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:11:01,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:11:01,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:11:01,432 INFO L87 Difference]: Start difference. First operand 638 states and 1766 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:01,723 INFO L93 Difference]: Finished difference Result 915 states and 2465 transitions. [2022-02-10 03:11:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:11:01,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:01,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:01,724 INFO L225 Difference]: With dead ends: 915 [2022-02-10 03:11:01,724 INFO L226 Difference]: Without dead ends: 915 [2022-02-10 03:11:01,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:11:01,724 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:01,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 135 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 303 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-02-10 03:11:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-02-10 03:11:01,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 640. [2022-02-10 03:11:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.7699530516431925) internal successors, (1770), 639 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1770 transitions. [2022-02-10 03:11:01,732 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1770 transitions. Word has length 25 [2022-02-10 03:11:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:01,732 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1770 transitions. [2022-02-10 03:11:01,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1770 transitions. [2022-02-10 03:11:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:01,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:01,733 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:01,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-02-10 03:11:01,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:01,935 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:01,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:01,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1353096169, now seen corresponding path program 376 times [2022-02-10 03:11:01,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:01,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626095348] [2022-02-10 03:11:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:01,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:02,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:02,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626095348] [2022-02-10 03:11:02,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626095348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:02,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859460461] [2022-02-10 03:11:02,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:11:02,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:02,072 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:02,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-02-10 03:11:02,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:11:02,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:02,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:11:02,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:02,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:02,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:11:02,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:11:02,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:02,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2022-02-10 03:11:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:02,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:02,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:02,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-10 03:11:02,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:02,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:11:02,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:02,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:11:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:02,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859460461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:02,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:02,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:11:02,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644638421] [2022-02-10 03:11:02,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:02,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:11:02,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:02,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:11:02,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:02,613 INFO L87 Difference]: Start difference. First operand 640 states and 1770 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:02,766 INFO L93 Difference]: Finished difference Result 778 states and 2106 transitions. [2022-02-10 03:11:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:11:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:02,768 INFO L225 Difference]: With dead ends: 778 [2022-02-10 03:11:02,768 INFO L226 Difference]: Without dead ends: 760 [2022-02-10 03:11:02,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:02,769 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:02,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-02-10 03:11:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-02-10 03:11:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 640. [2022-02-10 03:11:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.7621283255086073) internal successors, (1765), 639 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1765 transitions. [2022-02-10 03:11:02,778 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1765 transitions. Word has length 25 [2022-02-10 03:11:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:02,778 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1765 transitions. [2022-02-10 03:11:02,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1765 transitions. [2022-02-10 03:11:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:02,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:02,779 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:02,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-02-10 03:11:02,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:02,980 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:02,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash 297569445, now seen corresponding path program 377 times [2022-02-10 03:11:02,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:02,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720129153] [2022-02-10 03:11:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:02,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:03,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:03,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720129153] [2022-02-10 03:11:03,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720129153] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:03,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009221694] [2022-02-10 03:11:03,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:11:03,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:03,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:03,076 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:03,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-02-10 03:11:03,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:11:03,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:03,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:11:03,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:03,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:03,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:03,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:11:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:03,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:03,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:03,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:03,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:03,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:03,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:03,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:03,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009221694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:03,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:03,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:11:03,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482566283] [2022-02-10 03:11:03,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:03,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:11:03,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:03,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:11:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:11:03,620 INFO L87 Difference]: Start difference. First operand 640 states and 1765 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:03,742 INFO L93 Difference]: Finished difference Result 944 states and 2494 transitions. [2022-02-10 03:11:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:11:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:03,743 INFO L225 Difference]: With dead ends: 944 [2022-02-10 03:11:03,744 INFO L226 Difference]: Without dead ends: 944 [2022-02-10 03:11:03,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:11:03,744 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:03,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 114 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-02-10 03:11:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-02-10 03:11:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 646. [2022-02-10 03:11:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 2.7767441860465114) internal successors, (1791), 645 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1791 transitions. [2022-02-10 03:11:03,751 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1791 transitions. Word has length 25 [2022-02-10 03:11:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:03,751 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1791 transitions. [2022-02-10 03:11:03,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1791 transitions. [2022-02-10 03:11:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:03,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:03,752 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:03,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Ended with exit code 0 [2022-02-10 03:11:03,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:03,953 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash -342892627, now seen corresponding path program 378 times [2022-02-10 03:11:03,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:03,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774221265] [2022-02-10 03:11:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:03,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:11:04,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:04,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774221265] [2022-02-10 03:11:04,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774221265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:04,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675698566] [2022-02-10 03:11:04,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:11:04,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:04,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:04,067 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:04,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-02-10 03:11:04,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:11:04,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:04,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:04,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:04,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:04,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:04,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:04,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:11:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:11:04,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:04,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:04,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:04,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:04,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:04,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:04,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:11:04,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675698566] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:04,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:04,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:11:04,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916720996] [2022-02-10 03:11:04,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:04,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:11:04,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:04,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:11:04,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:11:04,543 INFO L87 Difference]: Start difference. First operand 646 states and 1791 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:04,716 INFO L93 Difference]: Finished difference Result 1010 states and 2647 transitions. [2022-02-10 03:11:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:11:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:04,717 INFO L225 Difference]: With dead ends: 1010 [2022-02-10 03:11:04,717 INFO L226 Difference]: Without dead ends: 1010 [2022-02-10 03:11:04,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:04,717 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:04,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 165 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 346 Invalid, 0 Unknown, 175 Unchecked, 0.1s Time] [2022-02-10 03:11:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-02-10 03:11:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 634. [2022-02-10 03:11:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.7630331753554502) internal successors, (1749), 633 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1749 transitions. [2022-02-10 03:11:04,725 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1749 transitions. Word has length 25 [2022-02-10 03:11:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:04,725 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1749 transitions. [2022-02-10 03:11:04,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1749 transitions. [2022-02-10 03:11:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:04,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:04,726 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:04,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-02-10 03:11:04,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:04,926 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash 18888451, now seen corresponding path program 379 times [2022-02-10 03:11:04,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:04,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613685224] [2022-02-10 03:11:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:04,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:05,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:05,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613685224] [2022-02-10 03:11:05,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613685224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:05,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911108767] [2022-02-10 03:11:05,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:11:05,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:05,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:05,017 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:05,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-02-10 03:11:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:05,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:05,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:05,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:05,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:05,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:05,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:11:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:05,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:05,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:05,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:05,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:05,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:05,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:05,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:05,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911108767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:05,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:05,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:11:05,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020471897] [2022-02-10 03:11:05,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:05,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:11:05,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:11:05,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:11:05,437 INFO L87 Difference]: Start difference. First operand 634 states and 1749 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:05,635 INFO L93 Difference]: Finished difference Result 950 states and 2561 transitions. [2022-02-10 03:11:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:11:05,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:05,636 INFO L225 Difference]: With dead ends: 950 [2022-02-10 03:11:05,636 INFO L226 Difference]: Without dead ends: 950 [2022-02-10 03:11:05,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:05,637 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:05,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 156 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-02-10 03:11:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-02-10 03:11:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 642. [2022-02-10 03:11:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.78003120124805) internal successors, (1782), 641 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1782 transitions. [2022-02-10 03:11:05,644 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1782 transitions. Word has length 25 [2022-02-10 03:11:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:05,644 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1782 transitions. [2022-02-10 03:11:05,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1782 transitions. [2022-02-10 03:11:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:05,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:05,645 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:05,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Ended with exit code 0 [2022-02-10 03:11:05,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-02-10 03:11:05,846 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:05,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1760933501, now seen corresponding path program 380 times [2022-02-10 03:11:05,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:05,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484497953] [2022-02-10 03:11:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:05,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:05,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:05,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484497953] [2022-02-10 03:11:05,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484497953] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:05,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016021519] [2022-02-10 03:11:05,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:11:05,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:05,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:05,943 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:05,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-02-10 03:11:05,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:11:05,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:05,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:05,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:06,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:06,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:06,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:06,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:06,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:11:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:06,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:06,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:06,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:06,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:06,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:06,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:06,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:06,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016021519] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:06,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:06,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:11:06,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530689361] [2022-02-10 03:11:06,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:06,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:11:06,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:06,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:11:06,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:06,462 INFO L87 Difference]: Start difference. First operand 642 states and 1782 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:06,653 INFO L93 Difference]: Finished difference Result 897 states and 2387 transitions. [2022-02-10 03:11:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:11:06,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:06,654 INFO L225 Difference]: With dead ends: 897 [2022-02-10 03:11:06,655 INFO L226 Difference]: Without dead ends: 897 [2022-02-10 03:11:06,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:06,655 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:06,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 137 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 159 Unchecked, 0.1s Time] [2022-02-10 03:11:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-02-10 03:11:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 645. [2022-02-10 03:11:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.779503105590062) internal successors, (1790), 644 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1790 transitions. [2022-02-10 03:11:06,662 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1790 transitions. Word has length 25 [2022-02-10 03:11:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:06,662 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1790 transitions. [2022-02-10 03:11:06,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1790 transitions. [2022-02-10 03:11:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:06,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:06,663 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:06,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-02-10 03:11:06,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:06,863 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:06,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash 741170363, now seen corresponding path program 381 times [2022-02-10 03:11:06,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:06,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74285918] [2022-02-10 03:11:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:06,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:06,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:06,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74285918] [2022-02-10 03:11:06,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74285918] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:06,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484893632] [2022-02-10 03:11:06,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:11:06,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:06,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:06,981 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:06,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-02-10 03:11:07,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:11:07,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:07,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:07,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:07,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:11:07,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:11:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:07,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:07,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:07,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:11:07,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:07,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:11:07,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:07,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:11:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:07,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484893632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:07,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:07,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:11:07,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613928803] [2022-02-10 03:11:07,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:07,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:11:07,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:07,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:11:07,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:07,516 INFO L87 Difference]: Start difference. First operand 645 states and 1790 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:07,905 INFO L93 Difference]: Finished difference Result 750 states and 2021 transitions. [2022-02-10 03:11:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:11:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:07,906 INFO L225 Difference]: With dead ends: 750 [2022-02-10 03:11:07,906 INFO L226 Difference]: Without dead ends: 750 [2022-02-10 03:11:07,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:11:07,906 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:07,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 122 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-02-10 03:11:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 650. [2022-02-10 03:11:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.785824345146379) internal successors, (1808), 649 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:07,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1808 transitions. [2022-02-10 03:11:07,913 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1808 transitions. Word has length 25 [2022-02-10 03:11:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:07,913 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1808 transitions. [2022-02-10 03:11:07,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1808 transitions. [2022-02-10 03:11:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:07,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:07,914 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:07,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:08,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-02-10 03:11:08,114 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:08,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:08,115 INFO L85 PathProgramCache]: Analyzing trace with hash 445908633, now seen corresponding path program 382 times [2022-02-10 03:11:08,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:08,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859867317] [2022-02-10 03:11:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:08,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:08,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:08,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859867317] [2022-02-10 03:11:08,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859867317] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:08,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784234256] [2022-02-10 03:11:08,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:11:08,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:08,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:08,234 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:08,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-02-10 03:11:08,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:11:08,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:08,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:08,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:08,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:11:08,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:11:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:08,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:08,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:08,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:11:08,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:08,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:11:08,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:08,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-02-10 03:11:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:08,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784234256] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:08,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:08,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:11:08,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523966140] [2022-02-10 03:11:08,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:08,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:11:08,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:08,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:11:08,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:08,741 INFO L87 Difference]: Start difference. First operand 650 states and 1808 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:09,218 INFO L93 Difference]: Finished difference Result 770 states and 2068 transitions. [2022-02-10 03:11:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:11:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:09,219 INFO L225 Difference]: With dead ends: 770 [2022-02-10 03:11:09,219 INFO L226 Difference]: Without dead ends: 770 [2022-02-10 03:11:09,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:11:09,220 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:09,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 171 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:11:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-02-10 03:11:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 649. [2022-02-10 03:11:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.7854938271604937) internal successors, (1805), 648 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1805 transitions. [2022-02-10 03:11:09,227 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1805 transitions. Word has length 25 [2022-02-10 03:11:09,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:09,227 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1805 transitions. [2022-02-10 03:11:09,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1805 transitions. [2022-02-10 03:11:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:09,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:09,228 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:09,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Ended with exit code 0 [2022-02-10 03:11:09,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-02-10 03:11:09,428 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1175193411, now seen corresponding path program 383 times [2022-02-10 03:11:09,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:09,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845984526] [2022-02-10 03:11:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:09,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:09,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:09,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845984526] [2022-02-10 03:11:09,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845984526] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:09,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145109216] [2022-02-10 03:11:09,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:11:09,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:09,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:09,564 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:09,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-02-10 03:11:09,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:11:09,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:09,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:09,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:09,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:09,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:09,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:09,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:11:09,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:09,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:11:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:09,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:10,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:10,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:11:10,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:10,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:10,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:10,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:10,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145109216] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:10,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:10,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:11:10,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800675741] [2022-02-10 03:11:10,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:10,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:11:10,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:10,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:11:10,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:11:10,207 INFO L87 Difference]: Start difference. First operand 649 states and 1805 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:10,406 INFO L93 Difference]: Finished difference Result 704 states and 1951 transitions. [2022-02-10 03:11:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:11:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:10,407 INFO L225 Difference]: With dead ends: 704 [2022-02-10 03:11:10,408 INFO L226 Difference]: Without dead ends: 704 [2022-02-10 03:11:10,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:11:10,408 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:10,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 86 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 230 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-02-10 03:11:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-02-10 03:11:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 649. [2022-02-10 03:11:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.7854938271604937) internal successors, (1805), 648 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1805 transitions. [2022-02-10 03:11:10,414 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1805 transitions. Word has length 25 [2022-02-10 03:11:10,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:10,415 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1805 transitions. [2022-02-10 03:11:10,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1805 transitions. [2022-02-10 03:11:10,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:10,415 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:10,415 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:10,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Ended with exit code 0 [2022-02-10 03:11:10,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:10,618 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash -648431041, now seen corresponding path program 384 times [2022-02-10 03:11:10,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:10,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096632025] [2022-02-10 03:11:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:10,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:10,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:10,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096632025] [2022-02-10 03:11:10,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096632025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:10,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537625977] [2022-02-10 03:11:10,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:11:10,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:10,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:10,710 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:10,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-02-10 03:11:10,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:11:10,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:10,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:10,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:10,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:10,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:11:10,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:11:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:11,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:11,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:11,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:11,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:11,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:11,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:11,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:11,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537625977] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:11,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:11,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:11:11,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025883490] [2022-02-10 03:11:11,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:11,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:11:11,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:11,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:11:11,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:11,200 INFO L87 Difference]: Start difference. First operand 649 states and 1805 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:11,588 INFO L93 Difference]: Finished difference Result 948 states and 2452 transitions. [2022-02-10 03:11:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:11:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:11,590 INFO L225 Difference]: With dead ends: 948 [2022-02-10 03:11:11,590 INFO L226 Difference]: Without dead ends: 948 [2022-02-10 03:11:11,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:11:11,590 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 102 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:11,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 157 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-02-10 03:11:11,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 654. [2022-02-10 03:11:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.77947932618683) internal successors, (1815), 653 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1815 transitions. [2022-02-10 03:11:11,597 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1815 transitions. Word has length 25 [2022-02-10 03:11:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:11,598 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1815 transitions. [2022-02-10 03:11:11,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1815 transitions. [2022-02-10 03:11:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:11,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:11,598 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:11,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-02-10 03:11:11,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:11,799 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:11,799 INFO L85 PathProgramCache]: Analyzing trace with hash -943692771, now seen corresponding path program 385 times [2022-02-10 03:11:11,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:11,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545507380] [2022-02-10 03:11:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:11,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:11,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:11,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545507380] [2022-02-10 03:11:11,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545507380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:11,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975632165] [2022-02-10 03:11:11,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:11:11,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:11,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:11,908 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:11,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-02-10 03:11:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:11,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:11,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:12,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:12,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:12,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:12,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:11:12,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:12,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:11:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:12,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:12,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:12,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:12,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:12,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:12,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:12,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:12,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975632165] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:12,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:12,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:11:12,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508610487] [2022-02-10 03:11:12,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:12,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:11:12,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:11:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:12,789 INFO L87 Difference]: Start difference. First operand 654 states and 1815 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:12,933 INFO L93 Difference]: Finished difference Result 708 states and 1950 transitions. [2022-02-10 03:11:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:11:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:12,934 INFO L225 Difference]: With dead ends: 708 [2022-02-10 03:11:12,934 INFO L226 Difference]: Without dead ends: 708 [2022-02-10 03:11:12,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:12,934 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:12,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-02-10 03:11:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-10 03:11:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 654. [2022-02-10 03:11:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.77947932618683) internal successors, (1815), 653 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1815 transitions. [2022-02-10 03:11:12,941 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1815 transitions. Word has length 25 [2022-02-10 03:11:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:12,941 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1815 transitions. [2022-02-10 03:11:12,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1815 transitions. [2022-02-10 03:11:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:12,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:12,942 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:12,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:13,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:13,142 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash 234882051, now seen corresponding path program 386 times [2022-02-10 03:11:13,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:13,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081262524] [2022-02-10 03:11:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:13,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:13,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:13,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081262524] [2022-02-10 03:11:13,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081262524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:13,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30649871] [2022-02-10 03:11:13,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:11:13,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:13,246 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:13,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-02-10 03:11:13,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:11:13,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:13,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:13,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:13,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:13,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:13,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:13,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:11:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:13,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:13,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:13,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:13,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:13,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:13,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:13,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:14,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30649871] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:14,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:14,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:11:14,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086983373] [2022-02-10 03:11:14,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:14,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:11:14,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:11:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:14,002 INFO L87 Difference]: Start difference. First operand 654 states and 1815 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:14,186 INFO L93 Difference]: Finished difference Result 790 states and 2115 transitions. [2022-02-10 03:11:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:11:14,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:14,188 INFO L225 Difference]: With dead ends: 790 [2022-02-10 03:11:14,188 INFO L226 Difference]: Without dead ends: 790 [2022-02-10 03:11:14,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:14,188 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:14,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 145 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 262 Invalid, 0 Unknown, 187 Unchecked, 0.1s Time] [2022-02-10 03:11:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-02-10 03:11:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 656. [2022-02-10 03:11:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.7770992366412215) internal successors, (1819), 655 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1819 transitions. [2022-02-10 03:11:14,195 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1819 transitions. Word has length 25 [2022-02-10 03:11:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:14,195 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1819 transitions. [2022-02-10 03:11:14,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:14,195 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1819 transitions. [2022-02-10 03:11:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:14,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:14,196 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:14,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:14,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:14,396 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:14,397 INFO L85 PathProgramCache]: Analyzing trace with hash -763632897, now seen corresponding path program 387 times [2022-02-10 03:11:14,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:14,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356535801] [2022-02-10 03:11:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:14,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:14,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:14,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356535801] [2022-02-10 03:11:14,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356535801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:14,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20685624] [2022-02-10 03:11:14,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:11:14,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:14,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:14,543 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:14,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-02-10 03:11:14,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:11:14,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:14,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:14,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:14,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:11:14,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-02-10 03:11:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:14,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:15,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:15,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:11:15,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:15,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:11:15,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:15,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:11:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:15,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20685624] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:15,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:15,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:11:15,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175650708] [2022-02-10 03:11:15,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:15,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:11:15,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:15,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:11:15,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:15,148 INFO L87 Difference]: Start difference. First operand 656 states and 1819 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:15,446 INFO L93 Difference]: Finished difference Result 750 states and 1999 transitions. [2022-02-10 03:11:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:11:15,447 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:15,458 INFO L225 Difference]: With dead ends: 750 [2022-02-10 03:11:15,458 INFO L226 Difference]: Without dead ends: 732 [2022-02-10 03:11:15,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:11:15,458 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:15,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 182 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 342 Invalid, 0 Unknown, 221 Unchecked, 0.1s Time] [2022-02-10 03:11:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-02-10 03:11:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 656. [2022-02-10 03:11:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 2.769465648854962) internal successors, (1814), 655 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1814 transitions. [2022-02-10 03:11:15,465 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1814 transitions. Word has length 25 [2022-02-10 03:11:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 1814 transitions. [2022-02-10 03:11:15,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1814 transitions. [2022-02-10 03:11:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:15,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:15,466 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:15,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Ended with exit code 0 [2022-02-10 03:11:15,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:15,666 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:15,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1819159621, now seen corresponding path program 388 times [2022-02-10 03:11:15,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:15,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450047986] [2022-02-10 03:11:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:15,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:15,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:15,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450047986] [2022-02-10 03:11:15,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450047986] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:15,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604868405] [2022-02-10 03:11:15,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:11:15,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:15,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:15,753 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:15,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-02-10 03:11:15,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:11:15,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:15,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:15,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:15,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:16,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:16,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:11:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:16,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:16,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:16,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:16,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:16,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:16,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:16,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:16,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604868405] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:16,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:16,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-10 03:11:16,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129456874] [2022-02-10 03:11:16,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:16,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:11:16,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:11:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:11:16,258 INFO L87 Difference]: Start difference. First operand 656 states and 1814 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:16,370 INFO L93 Difference]: Finished difference Result 990 states and 2612 transitions. [2022-02-10 03:11:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:11:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:16,372 INFO L225 Difference]: With dead ends: 990 [2022-02-10 03:11:16,372 INFO L226 Difference]: Without dead ends: 990 [2022-02-10 03:11:16,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:11:16,372 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:16,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 104 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 244 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-02-10 03:11:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-02-10 03:11:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 657. [2022-02-10 03:11:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.778963414634146) internal successors, (1823), 656 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1823 transitions. [2022-02-10 03:11:16,381 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1823 transitions. Word has length 25 [2022-02-10 03:11:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:16,381 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1823 transitions. [2022-02-10 03:11:16,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1823 transitions. [2022-02-10 03:11:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:16,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:16,382 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:16,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Ended with exit code 0 [2022-02-10 03:11:16,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:16,583 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:16,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:16,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1964368675, now seen corresponding path program 389 times [2022-02-10 03:11:16,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:16,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932906845] [2022-02-10 03:11:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:16,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:16,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:16,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932906845] [2022-02-10 03:11:16,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932906845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:16,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209819708] [2022-02-10 03:11:16,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:11:16,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:16,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:16,711 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:16,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-02-10 03:11:16,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:11:16,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:16,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:11:16,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:16,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:16,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:11:16,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:16,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:11:16,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:11:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:16,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:17,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:17,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-02-10 03:11:17,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:17,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:11:17,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:17,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:11:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:17,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209819708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:17,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:17,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:11:17,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712333372] [2022-02-10 03:11:17,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:17,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:11:17,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:11:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:17,099 INFO L87 Difference]: Start difference. First operand 657 states and 1823 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:17,265 INFO L93 Difference]: Finished difference Result 748 states and 1987 transitions. [2022-02-10 03:11:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:11:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:17,267 INFO L225 Difference]: With dead ends: 748 [2022-02-10 03:11:17,267 INFO L226 Difference]: Without dead ends: 744 [2022-02-10 03:11:17,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:17,267 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:17,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 112 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 331 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-02-10 03:11:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-02-10 03:11:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 665. [2022-02-10 03:11:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.7590361445783134) internal successors, (1832), 664 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1832 transitions. [2022-02-10 03:11:17,273 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1832 transitions. Word has length 25 [2022-02-10 03:11:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:17,273 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1832 transitions. [2022-02-10 03:11:17,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1832 transitions. [2022-02-10 03:11:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:17,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:17,274 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:17,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Ended with exit code 0 [2022-02-10 03:11:17,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2022-02-10 03:11:17,475 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:17,475 INFO L85 PathProgramCache]: Analyzing trace with hash -103538561, now seen corresponding path program 390 times [2022-02-10 03:11:17,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:17,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012291730] [2022-02-10 03:11:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:17,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:17,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:17,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012291730] [2022-02-10 03:11:17,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012291730] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:17,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710898228] [2022-02-10 03:11:17,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:11:17,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:17,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:17,640 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:17,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-02-10 03:11:17,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:11:17,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:17,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:17,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:17,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:17,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:17,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:11:17,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:11:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:17,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:18,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:18,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:11:18,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:18,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:11:18,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:18,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-10 03:11:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:18,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710898228] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:18,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:18,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:11:18,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396131470] [2022-02-10 03:11:18,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:18,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:11:18,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:11:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:18,127 INFO L87 Difference]: Start difference. First operand 665 states and 1832 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:18,371 INFO L93 Difference]: Finished difference Result 734 states and 1966 transitions. [2022-02-10 03:11:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:11:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:18,372 INFO L225 Difference]: With dead ends: 734 [2022-02-10 03:11:18,372 INFO L226 Difference]: Without dead ends: 724 [2022-02-10 03:11:18,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:18,372 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:18,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 105 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 242 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-02-10 03:11:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-10 03:11:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 657. [2022-02-10 03:11:18,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.777439024390244) internal successors, (1822), 656 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1822 transitions. [2022-02-10 03:11:18,379 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1822 transitions. Word has length 25 [2022-02-10 03:11:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:18,379 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1822 transitions. [2022-02-10 03:11:18,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1822 transitions. [2022-02-10 03:11:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:18,380 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:18,380 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:18,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:18,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:18,580 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:18,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2097840615, now seen corresponding path program 391 times [2022-02-10 03:11:18,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:18,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226003631] [2022-02-10 03:11:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:18,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:18,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:18,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226003631] [2022-02-10 03:11:18,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226003631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:18,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451404923] [2022-02-10 03:11:18,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:11:18,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:18,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:18,667 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:18,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-02-10 03:11:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:18,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:18,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:18,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:18,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:18,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:18,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:11:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:18,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:19,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:19,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:19,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:19,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:19,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:19,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:19,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451404923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:19,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:19,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-10 03:11:19,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003329721] [2022-02-10 03:11:19,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:19,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:11:19,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:11:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:11:19,070 INFO L87 Difference]: Start difference. First operand 657 states and 1822 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:19,192 INFO L93 Difference]: Finished difference Result 847 states and 2303 transitions. [2022-02-10 03:11:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:11:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:19,194 INFO L225 Difference]: With dead ends: 847 [2022-02-10 03:11:19,194 INFO L226 Difference]: Without dead ends: 847 [2022-02-10 03:11:19,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:11:19,194 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:19,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 155 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 308 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-02-10 03:11:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-02-10 03:11:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 662. [2022-02-10 03:11:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.7806354009077157) internal successors, (1838), 661 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1838 transitions. [2022-02-10 03:11:19,201 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1838 transitions. Word has length 25 [2022-02-10 03:11:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:19,201 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1838 transitions. [2022-02-10 03:11:19,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1838 transitions. [2022-02-10 03:11:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:19,202 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:19,202 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:19,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:19,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-02-10 03:11:19,403 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash 417304729, now seen corresponding path program 392 times [2022-02-10 03:11:19,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:19,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781618758] [2022-02-10 03:11:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:19,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:19,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:19,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781618758] [2022-02-10 03:11:19,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781618758] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:19,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176818701] [2022-02-10 03:11:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:11:19,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:19,501 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:19,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-02-10 03:11:19,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:11:19,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:19,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:19,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:19,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:19,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:19,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:19,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:11:19,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:11:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:19,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:19,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:19,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:19,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:19,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:19,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:19,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:20,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176818701] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:20,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:20,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:11:20,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827460034] [2022-02-10 03:11:20,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:20,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:11:20,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:20,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:11:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:20,009 INFO L87 Difference]: Start difference. First operand 662 states and 1838 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:20,175 INFO L93 Difference]: Finished difference Result 789 states and 2131 transitions. [2022-02-10 03:11:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:11:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:20,181 INFO L225 Difference]: With dead ends: 789 [2022-02-10 03:11:20,181 INFO L226 Difference]: Without dead ends: 789 [2022-02-10 03:11:20,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:20,181 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:20,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 114 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 337 Invalid, 0 Unknown, 161 Unchecked, 0.1s Time] [2022-02-10 03:11:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-02-10 03:11:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 662. [2022-02-10 03:11:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.7806354009077157) internal successors, (1838), 661 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1838 transitions. [2022-02-10 03:11:20,191 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1838 transitions. Word has length 25 [2022-02-10 03:11:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:20,191 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1838 transitions. [2022-02-10 03:11:20,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1838 transitions. [2022-02-10 03:11:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:20,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:20,193 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:20,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:20,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-02-10 03:11:20,407 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:20,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash 902710677, now seen corresponding path program 393 times [2022-02-10 03:11:20,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:20,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989558585] [2022-02-10 03:11:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:20,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:20,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:20,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989558585] [2022-02-10 03:11:20,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989558585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:20,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596060009] [2022-02-10 03:11:20,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:11:20,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:20,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:20,544 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:20,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-02-10 03:11:20,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:11:20,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:20,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:11:20,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:20,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:11:20,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:20,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:11:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:20,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:20,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:20,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:11:20,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:20,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 47 [2022-02-10 03:11:20,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:20,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 41 [2022-02-10 03:11:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:20,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596060009] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:20,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:20,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:11:20,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016073571] [2022-02-10 03:11:20,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:20,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:11:20,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:11:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:11:20,941 INFO L87 Difference]: Start difference. First operand 662 states and 1838 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:21,311 INFO L93 Difference]: Finished difference Result 713 states and 1925 transitions. [2022-02-10 03:11:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:11:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:21,313 INFO L225 Difference]: With dead ends: 713 [2022-02-10 03:11:21,313 INFO L226 Difference]: Without dead ends: 708 [2022-02-10 03:11:21,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:21,313 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:21,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 92 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:11:21,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-10 03:11:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 674. [2022-02-10 03:11:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 2.7533432392273403) internal successors, (1853), 673 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1853 transitions. [2022-02-10 03:11:21,319 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1853 transitions. Word has length 25 [2022-02-10 03:11:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:21,320 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 1853 transitions. [2022-02-10 03:11:21,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1853 transitions. [2022-02-10 03:11:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:21,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:21,320 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:21,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-02-10 03:11:21,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-02-10 03:11:21,521 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1334838205, now seen corresponding path program 394 times [2022-02-10 03:11:21,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:21,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600242445] [2022-02-10 03:11:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:21,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:21,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:21,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600242445] [2022-02-10 03:11:21,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600242445] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:21,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423207923] [2022-02-10 03:11:21,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:11:21,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:21,605 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:21,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-02-10 03:11:21,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:11:21,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:21,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:21,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:21,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:11:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:21,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:21,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:21,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:21,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:21,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:21,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:21,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:21,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423207923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:21,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:21,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-02-10 03:11:21,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763532543] [2022-02-10 03:11:21,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:21,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:11:21,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:11:21,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:11:21,925 INFO L87 Difference]: Start difference. First operand 674 states and 1853 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:22,088 INFO L93 Difference]: Finished difference Result 912 states and 2418 transitions. [2022-02-10 03:11:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:11:22,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:22,090 INFO L225 Difference]: With dead ends: 912 [2022-02-10 03:11:22,090 INFO L226 Difference]: Without dead ends: 912 [2022-02-10 03:11:22,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:11:22,090 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:22,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 110 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:11:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-02-10 03:11:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 669. [2022-02-10 03:11:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.748502994011976) internal successors, (1836), 668 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1836 transitions. [2022-02-10 03:11:22,098 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1836 transitions. Word has length 25 [2022-02-10 03:11:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:22,098 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1836 transitions. [2022-02-10 03:11:22,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1836 transitions. [2022-02-10 03:11:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:22,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:22,098 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:22,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Ended with exit code 0 [2022-02-10 03:11:22,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:22,299 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:22,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1180307139, now seen corresponding path program 395 times [2022-02-10 03:11:22,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:22,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81189809] [2022-02-10 03:11:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:22,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:22,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:22,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81189809] [2022-02-10 03:11:22,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81189809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:22,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074373642] [2022-02-10 03:11:22,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:11:22,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:22,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:22,385 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:22,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-02-10 03:11:22,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:11:22,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:22,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:22,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:22,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:22,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:11:22,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:11:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:22,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:22,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:22,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:11:22,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:22,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:22,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:22,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:22,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074373642] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:22,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:22,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:11:22,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145766484] [2022-02-10 03:11:22,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:22,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:11:22,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:11:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:11:22,774 INFO L87 Difference]: Start difference. First operand 669 states and 1836 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:23,015 INFO L93 Difference]: Finished difference Result 898 states and 2375 transitions. [2022-02-10 03:11:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:11:23,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:23,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:23,017 INFO L225 Difference]: With dead ends: 898 [2022-02-10 03:11:23,017 INFO L226 Difference]: Without dead ends: 898 [2022-02-10 03:11:23,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:23,017 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:23,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 158 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-02-10 03:11:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 665. [2022-02-10 03:11:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.75) internal successors, (1826), 664 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1826 transitions. [2022-02-10 03:11:23,024 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1826 transitions. Word has length 25 [2022-02-10 03:11:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:23,025 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1826 transitions. [2022-02-10 03:11:23,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1826 transitions. [2022-02-10 03:11:23,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:23,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:23,025 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:23,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-02-10 03:11:23,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2022-02-10 03:11:23,226 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash -642532233, now seen corresponding path program 396 times [2022-02-10 03:11:23,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:23,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513597334] [2022-02-10 03:11:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:23,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:23,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:23,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513597334] [2022-02-10 03:11:23,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513597334] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:23,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853159038] [2022-02-10 03:11:23,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:11:23,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:23,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:23,350 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:23,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-02-10 03:11:23,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:11:23,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:23,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:23,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:23,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:11:23,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:11:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:23,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:23,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:23,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:11:23,895 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:23,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:23,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853159038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:23,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:23,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:11:23,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014375026] [2022-02-10 03:11:23,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:23,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:11:23,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:11:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:23,901 INFO L87 Difference]: Start difference. First operand 665 states and 1826 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:24,386 INFO L93 Difference]: Finished difference Result 865 states and 2243 transitions. [2022-02-10 03:11:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:11:24,386 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:24,388 INFO L225 Difference]: With dead ends: 865 [2022-02-10 03:11:24,388 INFO L226 Difference]: Without dead ends: 865 [2022-02-10 03:11:24,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:11:24,388 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:24,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 152 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-02-10 03:11:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 667. [2022-02-10 03:11:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.7522522522522523) internal successors, (1833), 666 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1833 transitions. [2022-02-10 03:11:24,395 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1833 transitions. Word has length 25 [2022-02-10 03:11:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:24,395 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1833 transitions. [2022-02-10 03:11:24,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1833 transitions. [2022-02-10 03:11:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:24,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:24,396 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:24,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-02-10 03:11:24,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2022-02-10 03:11:24,597 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash -937793963, now seen corresponding path program 397 times [2022-02-10 03:11:24,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:24,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362270392] [2022-02-10 03:11:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:24,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:24,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:24,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362270392] [2022-02-10 03:11:24,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362270392] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:24,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123571977] [2022-02-10 03:11:24,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:11:24,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:24,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:24,721 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:24,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-02-10 03:11:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:24,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:24,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:24,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:11:24,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:11:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:25,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:25,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:25,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:11:25,247 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:25,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:25,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123571977] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:25,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:25,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:11:25,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050079258] [2022-02-10 03:11:25,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:25,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:11:25,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:11:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:25,253 INFO L87 Difference]: Start difference. First operand 667 states and 1833 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:25,889 INFO L93 Difference]: Finished difference Result 891 states and 2306 transitions. [2022-02-10 03:11:25,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:11:25,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:25,890 INFO L225 Difference]: With dead ends: 891 [2022-02-10 03:11:25,890 INFO L226 Difference]: Without dead ends: 891 [2022-02-10 03:11:25,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:11:25,891 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 109 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:25,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 195 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:11:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-02-10 03:11:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 665. [2022-02-10 03:11:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.75) internal successors, (1826), 664 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1826 transitions. [2022-02-10 03:11:25,898 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1826 transitions. Word has length 25 [2022-02-10 03:11:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:25,898 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1826 transitions. [2022-02-10 03:11:25,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1826 transitions. [2022-02-10 03:11:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:25,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:25,899 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:25,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-02-10 03:11:26,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2022-02-10 03:11:26,100 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash -208509185, now seen corresponding path program 398 times [2022-02-10 03:11:26,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:26,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783359997] [2022-02-10 03:11:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:26,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:26,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:26,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783359997] [2022-02-10 03:11:26,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783359997] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:26,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162773856] [2022-02-10 03:11:26,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:11:26,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:26,231 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:26,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-02-10 03:11:26,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:11:26,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:26,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:26,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:26,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:26,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:26,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-10 03:11:26,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-10 03:11:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:26,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:26,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:26,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-02-10 03:11:26,820 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:26,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:26,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162773856] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:26,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:26,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:11:26,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651410146] [2022-02-10 03:11:26,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:26,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:11:26,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:11:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:26,827 INFO L87 Difference]: Start difference. First operand 665 states and 1826 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:27,014 INFO L93 Difference]: Finished difference Result 756 states and 2083 transitions. [2022-02-10 03:11:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:11:27,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:27,015 INFO L225 Difference]: With dead ends: 756 [2022-02-10 03:11:27,015 INFO L226 Difference]: Without dead ends: 756 [2022-02-10 03:11:27,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:11:27,015 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:27,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 98 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 209 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-02-10 03:11:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-02-10 03:11:27,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 667. [2022-02-10 03:11:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.7462462462462462) internal successors, (1829), 666 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1829 transitions. [2022-02-10 03:11:27,022 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1829 transitions. Word has length 25 [2022-02-10 03:11:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:27,022 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1829 transitions. [2022-02-10 03:11:27,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1829 transitions. [2022-02-10 03:11:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:27,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:27,023 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:27,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Ended with exit code 0 [2022-02-10 03:11:27,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:27,223 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:27,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash -963930263, now seen corresponding path program 399 times [2022-02-10 03:11:27,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:27,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455465511] [2022-02-10 03:11:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:27,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:27,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:27,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455465511] [2022-02-10 03:11:27,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455465511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:27,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437808238] [2022-02-10 03:11:27,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:11:27,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:27,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:27,333 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:27,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-02-10 03:11:27,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:11:27,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:27,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:27,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:27,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:11:27,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:11:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:27,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:27,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:27,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:11:27,852 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:27,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:27,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437808238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:27,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:27,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:11:27,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083977208] [2022-02-10 03:11:27,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:27,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:11:27,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:27,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:11:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:27,858 INFO L87 Difference]: Start difference. First operand 667 states and 1829 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:28,454 INFO L93 Difference]: Finished difference Result 905 states and 2319 transitions. [2022-02-10 03:11:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:11:28,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:28,455 INFO L225 Difference]: With dead ends: 905 [2022-02-10 03:11:28,456 INFO L226 Difference]: Without dead ends: 905 [2022-02-10 03:11:28,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:11:28,456 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:28,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 183 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:11:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-02-10 03:11:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 667. [2022-02-10 03:11:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.7462462462462462) internal successors, (1829), 666 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1829 transitions. [2022-02-10 03:11:28,463 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1829 transitions. Word has length 25 [2022-02-10 03:11:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:28,463 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1829 transitions. [2022-02-10 03:11:28,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1829 transitions. [2022-02-10 03:11:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:28,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:28,464 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:28,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Ended with exit code 0 [2022-02-10 03:11:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2022-02-10 03:11:28,664 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1259191993, now seen corresponding path program 400 times [2022-02-10 03:11:28,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:28,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081441904] [2022-02-10 03:11:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:28,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:28,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:28,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081441904] [2022-02-10 03:11:28,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081441904] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:28,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709010093] [2022-02-10 03:11:28,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:11:28,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:28,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:28,772 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:28,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-02-10 03:11:28,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:11:28,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:28,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:28,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:28,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 65 [2022-02-10 03:11:28,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 55 [2022-02-10 03:11:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:29,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:29,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:29,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:11:29,252 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:29,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:29,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709010093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:29,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:29,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:11:29,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883543850] [2022-02-10 03:11:29,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:29,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:11:29,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:29,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:11:29,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:29,257 INFO L87 Difference]: Start difference. First operand 667 states and 1829 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:29,770 INFO L93 Difference]: Finished difference Result 892 states and 2300 transitions. [2022-02-10 03:11:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:11:29,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:29,772 INFO L225 Difference]: With dead ends: 892 [2022-02-10 03:11:29,772 INFO L226 Difference]: Without dead ends: 892 [2022-02-10 03:11:29,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:11:29,773 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 126 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:29,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 145 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-02-10 03:11:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 667. [2022-02-10 03:11:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.7462462462462462) internal successors, (1829), 666 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1829 transitions. [2022-02-10 03:11:29,780 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1829 transitions. Word has length 25 [2022-02-10 03:11:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:29,780 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1829 transitions. [2022-02-10 03:11:29,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1829 transitions. [2022-02-10 03:11:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:29,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:29,781 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:29,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Ended with exit code 0 [2022-02-10 03:11:29,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:29,981 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -116893561, now seen corresponding path program 401 times [2022-02-10 03:11:29,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:29,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28789916] [2022-02-10 03:11:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:29,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:30,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:30,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28789916] [2022-02-10 03:11:30,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28789916] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:30,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968759298] [2022-02-10 03:11:30,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:11:30,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:30,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:30,090 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:30,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-02-10 03:11:30,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:11:30,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:30,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:30,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:30,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:30,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:30,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:11:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:30,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:30,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:30,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:11:30,616 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:30,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:30,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968759298] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:30,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:30,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:11:30,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711514852] [2022-02-10 03:11:30,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:30,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:11:30,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:11:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:30,621 INFO L87 Difference]: Start difference. First operand 667 states and 1829 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:31,053 INFO L93 Difference]: Finished difference Result 846 states and 2190 transitions. [2022-02-10 03:11:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:11:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:31,055 INFO L225 Difference]: With dead ends: 846 [2022-02-10 03:11:31,055 INFO L226 Difference]: Without dead ends: 846 [2022-02-10 03:11:31,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:11:31,055 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:31,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 187 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-02-10 03:11:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 665. [2022-02-10 03:11:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.733433734939759) internal successors, (1815), 664 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1815 transitions. [2022-02-10 03:11:31,062 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1815 transitions. Word has length 25 [2022-02-10 03:11:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:31,063 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 1815 transitions. [2022-02-10 03:11:31,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1815 transitions. [2022-02-10 03:11:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:31,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:31,063 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:31,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Ended with exit code 0 [2022-02-10 03:11:31,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2022-02-10 03:11:31,264 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:31,264 INFO L85 PathProgramCache]: Analyzing trace with hash 291012867, now seen corresponding path program 402 times [2022-02-10 03:11:31,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:31,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128008831] [2022-02-10 03:11:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:31,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:31,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:31,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128008831] [2022-02-10 03:11:31,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128008831] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:31,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815085706] [2022-02-10 03:11:31,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:11:31,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:31,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:31,371 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:31,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-02-10 03:11:31,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:11:31,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:31,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:31,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:31,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:31,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:31,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:11:31,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:31,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:11:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:31,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:32,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:32,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:11:32,050 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:32,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:32,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815085706] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:32,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:32,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:11:32,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845010162] [2022-02-10 03:11:32,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:32,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:11:32,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:32,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:11:32,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:32,057 INFO L87 Difference]: Start difference. First operand 665 states and 1815 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:32,144 INFO L93 Difference]: Finished difference Result 770 states and 2085 transitions. [2022-02-10 03:11:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:11:32,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:32,145 INFO L225 Difference]: With dead ends: 770 [2022-02-10 03:11:32,145 INFO L226 Difference]: Without dead ends: 770 [2022-02-10 03:11:32,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:32,145 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:32,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 105 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 218 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-02-10 03:11:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-02-10 03:11:32,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 676. [2022-02-10 03:11:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.7496296296296294) internal successors, (1856), 675 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1856 transitions. [2022-02-10 03:11:32,152 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1856 transitions. Word has length 25 [2022-02-10 03:11:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:32,152 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 1856 transitions. [2022-02-10 03:11:32,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1856 transitions. [2022-02-10 03:11:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:32,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:32,153 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:32,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-02-10 03:11:32,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:32,354 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash -976573189, now seen corresponding path program 403 times [2022-02-10 03:11:32,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:32,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131572326] [2022-02-10 03:11:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:32,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:11:32,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:32,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131572326] [2022-02-10 03:11:32,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131572326] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:32,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018540036] [2022-02-10 03:11:32,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:11:32,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:32,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:32,488 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:32,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-02-10 03:11:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:32,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:32,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:32,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:32,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:11:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:11:32,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:33,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:33,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:11:33,166 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:33,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:11:33,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018540036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:33,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:33,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:11:33,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075080368] [2022-02-10 03:11:33,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:33,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:11:33,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:11:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:33,172 INFO L87 Difference]: Start difference. First operand 676 states and 1856 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:33,273 INFO L93 Difference]: Finished difference Result 766 states and 2073 transitions. [2022-02-10 03:11:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:11:33,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:33,275 INFO L225 Difference]: With dead ends: 766 [2022-02-10 03:11:33,275 INFO L226 Difference]: Without dead ends: 766 [2022-02-10 03:11:33,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:11:33,275 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:33,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 94 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-02-10 03:11:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-02-10 03:11:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 666. [2022-02-10 03:11:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.7338345864661653) internal successors, (1818), 665 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1818 transitions. [2022-02-10 03:11:33,282 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1818 transitions. Word has length 25 [2022-02-10 03:11:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:33,282 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 1818 transitions. [2022-02-10 03:11:33,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1818 transitions. [2022-02-10 03:11:33,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:33,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:33,282 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:33,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-02-10 03:11:33,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-02-10 03:11:33,483 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash -272166171, now seen corresponding path program 404 times [2022-02-10 03:11:33,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:33,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472044186] [2022-02-10 03:11:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:33,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:33,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:33,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472044186] [2022-02-10 03:11:33,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472044186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:33,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649728470] [2022-02-10 03:11:33,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:11:33,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:33,595 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:33,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-02-10 03:11:33,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:11:33,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:33,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:33,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:33,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:33,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:11:33,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:33,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-02-10 03:11:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:33,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:34,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:34,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:11:34,180 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:34,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:34,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649728470] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:34,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:34,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:11:34,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905950572] [2022-02-10 03:11:34,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:34,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:11:34,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:34,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:11:34,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:34,186 INFO L87 Difference]: Start difference. First operand 666 states and 1818 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:34,251 INFO L93 Difference]: Finished difference Result 750 states and 2039 transitions. [2022-02-10 03:11:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:11:34,251 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:34,252 INFO L225 Difference]: With dead ends: 750 [2022-02-10 03:11:34,253 INFO L226 Difference]: Without dead ends: 750 [2022-02-10 03:11:34,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:11:34,253 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:34,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 90 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-02-10 03:11:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-02-10 03:11:34,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 667. [2022-02-10 03:11:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.735735735735736) internal successors, (1822), 666 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1822 transitions. [2022-02-10 03:11:34,259 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1822 transitions. Word has length 25 [2022-02-10 03:11:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:34,259 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1822 transitions. [2022-02-10 03:11:34,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:34,260 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1822 transitions. [2022-02-10 03:11:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:34,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:34,260 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:34,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-02-10 03:11:34,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2022-02-10 03:11:34,461 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:34,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1025512957, now seen corresponding path program 405 times [2022-02-10 03:11:34,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:34,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839883377] [2022-02-10 03:11:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:34,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:34,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:34,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839883377] [2022-02-10 03:11:34,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839883377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:34,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460834178] [2022-02-10 03:11:34,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:11:34,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:34,567 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:34,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-02-10 03:11:34,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:11:34,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:34,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:34,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:34,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:34,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-02-10 03:11:34,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-10 03:11:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:34,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:34,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:34,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:11:35,038 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:35,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:35,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460834178] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:35,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:35,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:11:35,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126210983] [2022-02-10 03:11:35,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:35,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:11:35,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:35,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:11:35,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:35,044 INFO L87 Difference]: Start difference. First operand 667 states and 1822 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:35,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:35,493 INFO L93 Difference]: Finished difference Result 884 states and 2272 transitions. [2022-02-10 03:11:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:11:35,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:35,494 INFO L225 Difference]: With dead ends: 884 [2022-02-10 03:11:35,494 INFO L226 Difference]: Without dead ends: 884 [2022-02-10 03:11:35,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:11:35,495 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:35,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 162 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-02-10 03:11:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 669. [2022-02-10 03:11:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.7425149700598803) internal successors, (1832), 668 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1832 transitions. [2022-02-10 03:11:35,502 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1832 transitions. Word has length 25 [2022-02-10 03:11:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:35,502 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1832 transitions. [2022-02-10 03:11:35,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1832 transitions. [2022-02-10 03:11:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:35,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:35,503 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:35,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-02-10 03:11:35,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:35,703 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:35,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1360014009, now seen corresponding path program 406 times [2022-02-10 03:11:35,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:35,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421459472] [2022-02-10 03:11:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:35,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:35,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:35,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421459472] [2022-02-10 03:11:35,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421459472] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:35,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317236944] [2022-02-10 03:11:35,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:11:35,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:35,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:35,825 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:35,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-02-10 03:11:35,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:11:35,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:11:35,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:35,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:11:35,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-02-10 03:11:35,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-02-10 03:11:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:35,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:36,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:36,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:11:36,080 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:36,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 35 [2022-02-10 03:11:36,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-10 03:11:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:36,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317236944] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:36,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:36,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:11:36,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262732478] [2022-02-10 03:11:36,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:36,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:11:36,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:11:36,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:36,095 INFO L87 Difference]: Start difference. First operand 669 states and 1832 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:36,426 INFO L93 Difference]: Finished difference Result 778 states and 2055 transitions. [2022-02-10 03:11:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:11:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:36,427 INFO L225 Difference]: With dead ends: 778 [2022-02-10 03:11:36,427 INFO L226 Difference]: Without dead ends: 774 [2022-02-10 03:11:36,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:11:36,427 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:36,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 90 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:11:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-02-10 03:11:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 669. [2022-02-10 03:11:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.7425149700598803) internal successors, (1832), 668 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1832 transitions. [2022-02-10 03:11:36,434 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1832 transitions. Word has length 25 [2022-02-10 03:11:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:36,434 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1832 transitions. [2022-02-10 03:11:36,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1832 transitions. [2022-02-10 03:11:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:36,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:36,435 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:36,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-02-10 03:11:36,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2022-02-10 03:11:36,636 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash 500816105, now seen corresponding path program 407 times [2022-02-10 03:11:36,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:36,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123143939] [2022-02-10 03:11:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:36,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:36,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:36,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123143939] [2022-02-10 03:11:36,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123143939] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:36,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368749904] [2022-02-10 03:11:36,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:11:36,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:36,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:36,729 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:36,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-02-10 03:11:36,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:11:36,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:36,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:11:36,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:36,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-02-10 03:11:36,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-02-10 03:11:36,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-02-10 03:11:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:36,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:36,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:36,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:36,995 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:36,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2022-02-10 03:11:36,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-10 03:11:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:37,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368749904] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:37,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:37,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-02-10 03:11:37,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89324358] [2022-02-10 03:11:37,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:37,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:11:37,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:11:37,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:11:37,011 INFO L87 Difference]: Start difference. First operand 669 states and 1832 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:37,340 INFO L93 Difference]: Finished difference Result 778 states and 2049 transitions. [2022-02-10 03:11:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:11:37,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:37,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:37,342 INFO L225 Difference]: With dead ends: 778 [2022-02-10 03:11:37,342 INFO L226 Difference]: Without dead ends: 768 [2022-02-10 03:11:37,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:11:37,342 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 69 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:37,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 79 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:11:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-02-10 03:11:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 669. [2022-02-10 03:11:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.7350299401197606) internal successors, (1827), 668 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1827 transitions. [2022-02-10 03:11:37,358 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1827 transitions. Word has length 25 [2022-02-10 03:11:37,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:37,358 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1827 transitions. [2022-02-10 03:11:37,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:37,358 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1827 transitions. [2022-02-10 03:11:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:37,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:37,359 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:37,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Forceful destruction successful, exit code 0 [2022-02-10 03:11:37,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2022-02-10 03:11:37,559 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1942992505, now seen corresponding path program 408 times [2022-02-10 03:11:37,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:37,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266496173] [2022-02-10 03:11:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:37,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:37,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:37,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266496173] [2022-02-10 03:11:37,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266496173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:37,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526118724] [2022-02-10 03:11:37,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:11:37,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:37,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:37,690 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:37,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-02-10 03:11:37,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:11:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:37,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:37,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-02-10 03:11:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:37,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:37,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:37,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-02-10 03:11:38,002 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:38,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 35 [2022-02-10 03:11:38,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-02-10 03:11:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:38,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526118724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:38,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:38,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-10 03:11:38,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150610064] [2022-02-10 03:11:38,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:38,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 03:11:38,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 03:11:38,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:38,018 INFO L87 Difference]: Start difference. First operand 669 states and 1827 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:38,491 INFO L93 Difference]: Finished difference Result 760 states and 2025 transitions. [2022-02-10 03:11:38,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:11:38,492 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:38,493 INFO L225 Difference]: With dead ends: 760 [2022-02-10 03:11:38,493 INFO L226 Difference]: Without dead ends: 752 [2022-02-10 03:11:38,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:11:38,493 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:38,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 117 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-10 03:11:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 663. [2022-02-10 03:11:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.7477341389728096) internal successors, (1819), 662 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1819 transitions. [2022-02-10 03:11:38,500 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1819 transitions. Word has length 25 [2022-02-10 03:11:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:38,500 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1819 transitions. [2022-02-10 03:11:38,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1819 transitions. [2022-02-10 03:11:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:38,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:38,501 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:38,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Ended with exit code 0 [2022-02-10 03:11:38,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2022-02-10 03:11:38,701 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1313776667, now seen corresponding path program 409 times [2022-02-10 03:11:38,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:38,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052329426] [2022-02-10 03:11:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:38,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:38,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:38,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052329426] [2022-02-10 03:11:38,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052329426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:38,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715645954] [2022-02-10 03:11:38,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:11:38,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:38,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:38,789 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:38,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-02-10 03:11:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:38,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:38,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-10 03:11:38,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2022-02-10 03:11:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:38,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:39,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:39,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-02-10 03:11:39,124 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:39,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:39,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715645954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:39,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:39,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 03:11:39,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657896098] [2022-02-10 03:11:39,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:39,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:11:39,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:39,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:11:39,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:11:39,130 INFO L87 Difference]: Start difference. First operand 663 states and 1819 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:39,446 INFO L93 Difference]: Finished difference Result 849 states and 2195 transitions. [2022-02-10 03:11:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:11:39,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:39,447 INFO L225 Difference]: With dead ends: 849 [2022-02-10 03:11:39,447 INFO L226 Difference]: Without dead ends: 849 [2022-02-10 03:11:39,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:11:39,447 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 137 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:39,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 179 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-02-10 03:11:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 664. [2022-02-10 03:11:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.746606334841629) internal successors, (1821), 663 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1821 transitions. [2022-02-10 03:11:39,455 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1821 transitions. Word has length 25 [2022-02-10 03:11:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:39,455 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1821 transitions. [2022-02-10 03:11:39,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1821 transitions. [2022-02-10 03:11:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-10 03:11:39,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:39,456 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:39,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-02-10 03:11:39,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:39,656 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:39,656 INFO L85 PathProgramCache]: Analyzing trace with hash 547053447, now seen corresponding path program 410 times [2022-02-10 03:11:39,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:39,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388679251] [2022-02-10 03:11:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:39,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:39,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:39,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388679251] [2022-02-10 03:11:39,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388679251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:39,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191451285] [2022-02-10 03:11:39,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:11:39,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:39,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:39,745 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:39,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-02-10 03:11:39,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:11:39,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:39,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:39,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:39,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:39,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:11:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:39,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:40,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:40,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:11:40,056 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-10 03:11:40,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-10 03:11:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-10 03:11:40,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191451285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:40,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:40,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-02-10 03:11:40,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473761975] [2022-02-10 03:11:40,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:40,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:11:40,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:11:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:11:40,062 INFO L87 Difference]: Start difference. First operand 664 states and 1821 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:40,270 INFO L93 Difference]: Finished difference Result 808 states and 2114 transitions. [2022-02-10 03:11:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:11:40,270 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-10 03:11:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:40,271 INFO L225 Difference]: With dead ends: 808 [2022-02-10 03:11:40,271 INFO L226 Difference]: Without dead ends: 808 [2022-02-10 03:11:40,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:11:40,272 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 104 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:40,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 140 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-02-10 03:11:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 658. [2022-02-10 03:11:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 2.7290715372907153) internal successors, (1793), 657 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1793 transitions. [2022-02-10 03:11:40,279 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1793 transitions. Word has length 25 [2022-02-10 03:11:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:40,279 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 1793 transitions. [2022-02-10 03:11:40,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1793 transitions. [2022-02-10 03:11:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:40,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:40,280 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:40,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Ended with exit code 0 [2022-02-10 03:11:40,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:40,480 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash 501560525, now seen corresponding path program 411 times [2022-02-10 03:11:40,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:40,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002907233] [2022-02-10 03:11:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:40,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:40,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:40,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002907233] [2022-02-10 03:11:40,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002907233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:40,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144370593] [2022-02-10 03:11:40,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:11:40,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:40,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:40,753 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:40,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-02-10 03:11:40,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:11:40,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:40,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:11:40,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:40,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:11:41,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:11:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:41,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:41,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:41,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 100 [2022-02-10 03:11:41,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:41,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:11:41,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:41,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:11:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:41,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144370593] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:41,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:41,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-10 03:11:41,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060301907] [2022-02-10 03:11:41,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:41,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:11:41,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:11:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:11:41,910 INFO L87 Difference]: Start difference. First operand 658 states and 1793 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:42,707 INFO L93 Difference]: Finished difference Result 853 states and 2217 transitions. [2022-02-10 03:11:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:11:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:11:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:42,709 INFO L225 Difference]: With dead ends: 853 [2022-02-10 03:11:42,709 INFO L226 Difference]: Without dead ends: 822 [2022-02-10 03:11:42,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:11:42,709 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 159 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:42,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 241 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 866 Invalid, 0 Unknown, 10 Unchecked, 0.4s Time] [2022-02-10 03:11:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-02-10 03:11:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 684. [2022-02-10 03:11:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.7291361639824303) internal successors, (1864), 683 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1864 transitions. [2022-02-10 03:11:42,716 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1864 transitions. Word has length 26 [2022-02-10 03:11:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:42,716 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 1864 transitions. [2022-02-10 03:11:42,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1864 transitions. [2022-02-10 03:11:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:42,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:42,717 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:42,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-02-10 03:11:42,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2022-02-10 03:11:42,918 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:42,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1387358805, now seen corresponding path program 412 times [2022-02-10 03:11:42,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:42,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881858092] [2022-02-10 03:11:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:42,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:43,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:43,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881858092] [2022-02-10 03:11:43,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881858092] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:43,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454467794] [2022-02-10 03:11:43,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:11:43,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:43,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:43,141 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:43,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-02-10 03:11:43,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:11:43,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:43,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:11:43,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:43,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:11:43,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:11:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:43,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:43,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:43,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:11:44,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:44,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:11:44,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:44,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:11:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:44,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454467794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:44,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:44,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-02-10 03:11:44,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459955737] [2022-02-10 03:11:44,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:44,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:11:44,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:11:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:11:44,254 INFO L87 Difference]: Start difference. First operand 684 states and 1864 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:44,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:44,752 INFO L93 Difference]: Finished difference Result 774 states and 2025 transitions. [2022-02-10 03:11:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:11:44,753 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:11:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:44,754 INFO L225 Difference]: With dead ends: 774 [2022-02-10 03:11:44,754 INFO L226 Difference]: Without dead ends: 758 [2022-02-10 03:11:44,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:11:44,754 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:44,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 256 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 902 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-02-10 03:11:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-02-10 03:11:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 697. [2022-02-10 03:11:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.7298850574712645) internal successors, (1900), 696 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1900 transitions. [2022-02-10 03:11:44,761 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1900 transitions. Word has length 26 [2022-02-10 03:11:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:44,761 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1900 transitions. [2022-02-10 03:11:44,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1900 transitions. [2022-02-10 03:11:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:44,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:44,762 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:44,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Ended with exit code 0 [2022-02-10 03:11:44,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2022-02-10 03:11:44,963 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:44,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1795265233, now seen corresponding path program 413 times [2022-02-10 03:11:44,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:44,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545297917] [2022-02-10 03:11:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:44,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:45,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:45,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545297917] [2022-02-10 03:11:45,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545297917] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:45,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547799282] [2022-02-10 03:11:45,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:11:45,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:45,155 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:45,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-02-10 03:11:45,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:11:45,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:45,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:11:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:45,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:11:45,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:11:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:45,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:45,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:45,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:11:46,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:46,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:11:46,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:46,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:11:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:46,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547799282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:46,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:46,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-02-10 03:11:46,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390012284] [2022-02-10 03:11:46,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:46,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:11:46,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:11:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:11:46,129 INFO L87 Difference]: Start difference. First operand 697 states and 1900 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:46,507 INFO L93 Difference]: Finished difference Result 751 states and 2005 transitions. [2022-02-10 03:11:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:11:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:11:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:46,509 INFO L225 Difference]: With dead ends: 751 [2022-02-10 03:11:46,509 INFO L226 Difference]: Without dead ends: 746 [2022-02-10 03:11:46,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:11:46,509 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:46,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 194 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 695 Invalid, 0 Unknown, 35 Unchecked, 0.3s Time] [2022-02-10 03:11:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-02-10 03:11:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 709. [2022-02-10 03:11:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 2.730225988700565) internal successors, (1933), 708 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1933 transitions. [2022-02-10 03:11:46,518 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1933 transitions. Word has length 26 [2022-02-10 03:11:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:46,518 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1933 transitions. [2022-02-10 03:11:46,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1933 transitions. [2022-02-10 03:11:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:46,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:46,519 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:46,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-02-10 03:11:46,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:46,719 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:46,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1217665587, now seen corresponding path program 414 times [2022-02-10 03:11:46,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:46,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831480087] [2022-02-10 03:11:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:46,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:46,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:46,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831480087] [2022-02-10 03:11:46,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831480087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:46,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127831862] [2022-02-10 03:11:46,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:11:46,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:46,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:46,968 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:46,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-02-10 03:11:46,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:11:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:46,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:11:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:47,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:11:47,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:11:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:47,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:47,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:47,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:11:48,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:48,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:11:48,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:48,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:11:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:48,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127831862] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:48,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:48,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-02-10 03:11:48,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681526294] [2022-02-10 03:11:48,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:48,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:11:48,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:11:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:11:48,111 INFO L87 Difference]: Start difference. First operand 709 states and 1933 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:48,433 INFO L93 Difference]: Finished difference Result 792 states and 2085 transitions. [2022-02-10 03:11:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:11:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:11:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:48,434 INFO L225 Difference]: With dead ends: 792 [2022-02-10 03:11:48,434 INFO L226 Difference]: Without dead ends: 787 [2022-02-10 03:11:48,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:11:48,434 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:48,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 196 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 659 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-02-10 03:11:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-02-10 03:11:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 719. [2022-02-10 03:11:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.7284122562674096) internal successors, (1959), 718 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1959 transitions. [2022-02-10 03:11:48,442 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1959 transitions. Word has length 26 [2022-02-10 03:11:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:48,442 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1959 transitions. [2022-02-10 03:11:48,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1959 transitions. [2022-02-10 03:11:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:48,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:48,443 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:48,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Ended with exit code 0 [2022-02-10 03:11:48,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-02-10 03:11:48,643 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash -809759159, now seen corresponding path program 415 times [2022-02-10 03:11:48,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:48,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490923752] [2022-02-10 03:11:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:48,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:48,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:48,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490923752] [2022-02-10 03:11:48,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490923752] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:48,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041757137] [2022-02-10 03:11:48,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:11:48,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:48,868 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:48,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-02-10 03:11:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:11:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:49,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:11:49,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:11:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:49,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:49,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:49,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-02-10 03:11:49,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:49,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:11:49,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:49,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:49,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041757137] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:49,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:49,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-10 03:11:49,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852675787] [2022-02-10 03:11:49,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:49,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:11:49,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:11:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:11:49,935 INFO L87 Difference]: Start difference. First operand 719 states and 1959 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:50,479 INFO L93 Difference]: Finished difference Result 841 states and 2181 transitions. [2022-02-10 03:11:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:11:50,479 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:11:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:50,480 INFO L225 Difference]: With dead ends: 841 [2022-02-10 03:11:50,480 INFO L226 Difference]: Without dead ends: 813 [2022-02-10 03:11:50,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:11:50,481 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:50,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 270 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 870 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2022-02-10 03:11:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-02-10 03:11:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 724. [2022-02-10 03:11:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.727524204702628) internal successors, (1972), 723 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1972 transitions. [2022-02-10 03:11:50,488 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1972 transitions. Word has length 26 [2022-02-10 03:11:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:50,488 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1972 transitions. [2022-02-10 03:11:50,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1972 transitions. [2022-02-10 03:11:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:50,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:50,489 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:50,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Ended with exit code 0 [2022-02-10 03:11:50,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-02-10 03:11:50,689 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:50,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:50,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1049561779, now seen corresponding path program 416 times [2022-02-10 03:11:50,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:50,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552391642] [2022-02-10 03:11:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:50,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:50,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:50,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552391642] [2022-02-10 03:11:50,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552391642] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:50,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506267216] [2022-02-10 03:11:50,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:11:50,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:50,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:50,879 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:50,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-02-10 03:11:50,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:11:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:11:50,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:51,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:11:51,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:11:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:51,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:51,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:51,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 135 [2022-02-10 03:11:51,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:51,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:11:51,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:51,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:11:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:51,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506267216] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:51,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:51,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-10 03:11:51,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109245757] [2022-02-10 03:11:51,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:51,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:11:51,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:51,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:11:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:11:51,944 INFO L87 Difference]: Start difference. First operand 724 states and 1972 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:52,392 INFO L93 Difference]: Finished difference Result 839 states and 2224 transitions. [2022-02-10 03:11:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:11:52,392 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:11:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:52,393 INFO L225 Difference]: With dead ends: 839 [2022-02-10 03:11:52,393 INFO L226 Difference]: Without dead ends: 834 [2022-02-10 03:11:52,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:11:52,393 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:52,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 195 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 750 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2022-02-10 03:11:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-02-10 03:11:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 735. [2022-02-10 03:11:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.717983651226158) internal successors, (1995), 734 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1995 transitions. [2022-02-10 03:11:52,401 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1995 transitions. Word has length 26 [2022-02-10 03:11:52,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:52,401 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 1995 transitions. [2022-02-10 03:11:52,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1995 transitions. [2022-02-10 03:11:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:52,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:52,402 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:52,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Ended with exit code 0 [2022-02-10 03:11:52,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2022-02-10 03:11:52,602 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:52,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1326090035, now seen corresponding path program 417 times [2022-02-10 03:11:52,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:52,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065717842] [2022-02-10 03:11:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:52,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-10 03:11:52,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:52,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065717842] [2022-02-10 03:11:52,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065717842] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:52,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348162067] [2022-02-10 03:11:52,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:11:52,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:52,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:52,703 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:52,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-02-10 03:11:52,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:11:52,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:11:52,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:52,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:52,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-02-10 03:11:52,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-10 03:11:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-10 03:11:52,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:52,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:52,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-02-10 03:11:53,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:53,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:53,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:53,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-10 03:11:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-10 03:11:53,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348162067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:53,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:53,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-10 03:11:53,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773755157] [2022-02-10 03:11:53,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:53,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:11:53,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:53,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:11:53,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:11:53,104 INFO L87 Difference]: Start difference. First operand 735 states and 1995 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:53,296 INFO L93 Difference]: Finished difference Result 843 states and 2181 transitions. [2022-02-10 03:11:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:11:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:11:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:53,298 INFO L225 Difference]: With dead ends: 843 [2022-02-10 03:11:53,298 INFO L226 Difference]: Without dead ends: 843 [2022-02-10 03:11:53,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:11:53,298 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:53,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 116 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:11:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-02-10 03:11:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 721. [2022-02-10 03:11:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.702777777777778) internal successors, (1946), 720 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1946 transitions. [2022-02-10 03:11:53,306 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1946 transitions. Word has length 26 [2022-02-10 03:11:53,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:53,306 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1946 transitions. [2022-02-10 03:11:53,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1946 transitions. [2022-02-10 03:11:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:53,306 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:53,307 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:53,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Ended with exit code 0 [2022-02-10 03:11:53,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2022-02-10 03:11:53,507 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2014421265, now seen corresponding path program 418 times [2022-02-10 03:11:53,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:53,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116312460] [2022-02-10 03:11:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:53,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:11:53,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:53,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116312460] [2022-02-10 03:11:53,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116312460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:53,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897774535] [2022-02-10 03:11:53,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:11:53,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:53,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:53,760 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:53,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-02-10 03:11:53,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:11:53,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:11:53,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:53,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:11:54,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:11:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:11:54,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:54,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:54,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-02-10 03:11:55,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:55,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:11:55,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:55,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:11:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:11:55,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897774535] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:55,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:55,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:11:55,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492880615] [2022-02-10 03:11:55,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:55,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:11:55,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:55,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:11:55,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:11:55,149 INFO L87 Difference]: Start difference. First operand 721 states and 1946 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:56,227 INFO L93 Difference]: Finished difference Result 913 states and 2290 transitions. [2022-02-10 03:11:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:11:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:11:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:56,229 INFO L225 Difference]: With dead ends: 913 [2022-02-10 03:11:56,229 INFO L226 Difference]: Without dead ends: 889 [2022-02-10 03:11:56,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:11:56,229 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 138 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:56,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 326 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1037 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-02-10 03:11:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-10 03:11:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 736. [2022-02-10 03:11:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.7224489795918365) internal successors, (2001), 735 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2001 transitions. [2022-02-10 03:11:56,246 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2001 transitions. Word has length 26 [2022-02-10 03:11:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:56,246 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2001 transitions. [2022-02-10 03:11:56,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2001 transitions. [2022-02-10 03:11:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:56,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:56,247 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:56,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Ended with exit code 0 [2022-02-10 03:11:56,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2022-02-10 03:11:56,447 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1496830617, now seen corresponding path program 419 times [2022-02-10 03:11:56,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:56,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167885160] [2022-02-10 03:11:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:56,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:11:56,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:56,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167885160] [2022-02-10 03:11:56,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167885160] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:56,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518667586] [2022-02-10 03:11:56,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:11:56,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:56,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:56,708 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:56,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-02-10 03:11:56,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:11:56,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:56,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:11:56,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:56,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-10 03:11:56,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-10 03:11:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:11:57,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:11:57,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:57,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:11:57,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:57,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:11:57,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:11:57,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:11:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:11:57,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518667586] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:11:57,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:11:57,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-10 03:11:57,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246169551] [2022-02-10 03:11:57,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:11:57,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:11:57,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:11:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:11:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:11:57,923 INFO L87 Difference]: Start difference. First operand 736 states and 2001 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:11:58,331 INFO L93 Difference]: Finished difference Result 823 states and 2166 transitions. [2022-02-10 03:11:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:11:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:11:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:11:58,332 INFO L225 Difference]: With dead ends: 823 [2022-02-10 03:11:58,332 INFO L226 Difference]: Without dead ends: 818 [2022-02-10 03:11:58,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:11:58,333 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:11:58,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 226 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 782 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2022-02-10 03:11:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-02-10 03:11:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 736. [2022-02-10 03:11:58,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.7224489795918365) internal successors, (2001), 735 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2001 transitions. [2022-02-10 03:11:58,340 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2001 transitions. Word has length 26 [2022-02-10 03:11:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:11:58,340 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2001 transitions. [2022-02-10 03:11:58,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:11:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2001 transitions. [2022-02-10 03:11:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:11:58,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:11:58,341 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:11:58,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Ended with exit code 0 [2022-02-10 03:11:58,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:58,541 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:11:58,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:11:58,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1630032465, now seen corresponding path program 420 times [2022-02-10 03:11:58,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:11:58,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067348089] [2022-02-10 03:11:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:11:58,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:11:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:11:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:58,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:11:58,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067348089] [2022-02-10 03:11:58,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067348089] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:11:58,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616780761] [2022-02-10 03:11:58,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:11:58,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:11:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:11:58,830 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:11:58,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-02-10 03:11:58,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:11:58,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:11:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:11:58,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:11:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:59,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:11:59,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:59,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:11:59,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:11:59,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:11:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:11:59,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:00,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:00,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 75 [2022-02-10 03:12:00,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:00,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:00,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:00,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:00,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616780761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:00,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:00,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:00,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073825503] [2022-02-10 03:12:00,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:00,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:00,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:00,271 INFO L87 Difference]: Start difference. First operand 736 states and 2001 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:00,739 INFO L93 Difference]: Finished difference Result 823 states and 2206 transitions. [2022-02-10 03:12:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:12:00,739 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:00,740 INFO L225 Difference]: With dead ends: 823 [2022-02-10 03:12:00,740 INFO L226 Difference]: Without dead ends: 818 [2022-02-10 03:12:00,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:12:00,740 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:00,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 222 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 651 Invalid, 0 Unknown, 236 Unchecked, 0.3s Time] [2022-02-10 03:12:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-02-10 03:12:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 738. [2022-02-10 03:12:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.723202170963365) internal successors, (2007), 737 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2007 transitions. [2022-02-10 03:12:00,748 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2007 transitions. Word has length 26 [2022-02-10 03:12:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:00,748 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 2007 transitions. [2022-02-10 03:12:00,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2007 transitions. [2022-02-10 03:12:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:00,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:00,749 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:00,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:00,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:00,949 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash 337568649, now seen corresponding path program 421 times [2022-02-10 03:12:00,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:00,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44206027] [2022-02-10 03:12:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:00,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:01,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:01,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44206027] [2022-02-10 03:12:01,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44206027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:01,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844253044] [2022-02-10 03:12:01,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:12:01,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:01,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:01,274 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:01,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-02-10 03:12:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:01,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:01,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:01,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:12:01,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:01,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:12:01,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:01,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:12:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:02,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:02,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:02,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 100 [2022-02-10 03:12:03,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:03,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:12:03,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:03,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:12:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:03,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844253044] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:03,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:03,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:03,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757477706] [2022-02-10 03:12:03,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:03,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:03,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:03,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:03,083 INFO L87 Difference]: Start difference. First operand 738 states and 2007 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:04,467 INFO L93 Difference]: Finished difference Result 877 states and 2286 transitions. [2022-02-10 03:12:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:12:04,467 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:04,468 INFO L225 Difference]: With dead ends: 877 [2022-02-10 03:12:04,468 INFO L226 Difference]: Without dead ends: 846 [2022-02-10 03:12:04,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:12:04,469 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 106 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:04,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 236 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 683 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-02-10 03:12:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-02-10 03:12:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 752. [2022-02-10 03:12:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.7350199733688414) internal successors, (2054), 751 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2054 transitions. [2022-02-10 03:12:04,476 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2054 transitions. Word has length 26 [2022-02-10 03:12:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:04,477 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2054 transitions. [2022-02-10 03:12:04,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2054 transitions. [2022-02-10 03:12:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:04,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:04,477 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:04,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Ended with exit code 0 [2022-02-10 03:12:04,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2022-02-10 03:12:04,678 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1542802257, now seen corresponding path program 422 times [2022-02-10 03:12:04,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:04,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15997586] [2022-02-10 03:12:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:04,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:04,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:04,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15997586] [2022-02-10 03:12:04,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15997586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:04,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120289325] [2022-02-10 03:12:04,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:12:04,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:04,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:04,967 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:04,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-02-10 03:12:04,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:12:04,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:04,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:04,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:05,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:05,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:12:05,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:05,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:12:05,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:05,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:12:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:05,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:06,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:06,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 83 [2022-02-10 03:12:06,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:06,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:06,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:06,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:06,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120289325] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:06,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:06,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:12:06,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747403120] [2022-02-10 03:12:06,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:06,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:12:06,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:12:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:12:06,624 INFO L87 Difference]: Start difference. First operand 752 states and 2054 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:06,972 INFO L93 Difference]: Finished difference Result 806 states and 2152 transitions. [2022-02-10 03:12:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:12:06,972 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:06,974 INFO L225 Difference]: With dead ends: 806 [2022-02-10 03:12:06,974 INFO L226 Difference]: Without dead ends: 801 [2022-02-10 03:12:06,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:12:06,974 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:06,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 170 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 571 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-02-10 03:12:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-02-10 03:12:06,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 752. [2022-02-10 03:12:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.7350199733688414) internal successors, (2054), 751 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2054 transitions. [2022-02-10 03:12:06,981 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2054 transitions. Word has length 26 [2022-02-10 03:12:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:06,981 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2054 transitions. [2022-02-10 03:12:06,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2054 transitions. [2022-02-10 03:12:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:06,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:06,982 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:06,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Ended with exit code 0 [2022-02-10 03:12:07,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:07,182 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:07,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2035306783, now seen corresponding path program 423 times [2022-02-10 03:12:07,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:07,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377005493] [2022-02-10 03:12:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:07,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:07,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:07,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377005493] [2022-02-10 03:12:07,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377005493] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:07,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025554972] [2022-02-10 03:12:07,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:12:07,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:07,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:07,451 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:07,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-02-10 03:12:07,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:12:07,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:07,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:07,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:07,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:07,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:07,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:07,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:07,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:07,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:08,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:08,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:08,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 108 [2022-02-10 03:12:08,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:08,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:12:08,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:08,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:12:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:08,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025554972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:08,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:08,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:08,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715890241] [2022-02-10 03:12:08,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:08,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:08,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:08,978 INFO L87 Difference]: Start difference. First operand 752 states and 2054 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:10,044 INFO L93 Difference]: Finished difference Result 886 states and 2312 transitions. [2022-02-10 03:12:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:12:10,044 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:10,046 INFO L225 Difference]: With dead ends: 886 [2022-02-10 03:12:10,046 INFO L226 Difference]: Without dead ends: 855 [2022-02-10 03:12:10,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 03:12:10,046 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 122 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:10,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 228 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 594 Invalid, 0 Unknown, 275 Unchecked, 0.3s Time] [2022-02-10 03:12:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-02-10 03:12:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 768. [2022-02-10 03:12:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.7379400260756195) internal successors, (2100), 767 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2100 transitions. [2022-02-10 03:12:10,054 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2100 transitions. Word has length 26 [2022-02-10 03:12:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:10,054 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 2100 transitions. [2022-02-10 03:12:10,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2100 transitions. [2022-02-10 03:12:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:10,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:10,055 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:10,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-02-10 03:12:10,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:10,256 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:10,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1750625417, now seen corresponding path program 424 times [2022-02-10 03:12:10,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:10,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216692423] [2022-02-10 03:12:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:10,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:10,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:10,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216692423] [2022-02-10 03:12:10,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216692423] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:10,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039044797] [2022-02-10 03:12:10,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:12:10,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:10,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:10,515 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:10,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-02-10 03:12:10,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:12:10,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:10,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:10,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:10,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:10,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:10,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:10,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:10,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:10,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:11,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:11,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:11,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 100 [2022-02-10 03:12:11,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:11,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:12:11,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:11,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:12:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:11,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039044797] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:11,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:12,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:12:12,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113343743] [2022-02-10 03:12:12,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:12,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:12:12,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:12,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:12:12,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:12:12,000 INFO L87 Difference]: Start difference. First operand 768 states and 2100 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:12,690 INFO L93 Difference]: Finished difference Result 944 states and 2469 transitions. [2022-02-10 03:12:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:12:12,690 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:12,692 INFO L225 Difference]: With dead ends: 944 [2022-02-10 03:12:12,692 INFO L226 Difference]: Without dead ends: 913 [2022-02-10 03:12:12,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:12:12,692 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 125 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:12,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 230 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 570 Invalid, 0 Unknown, 348 Unchecked, 0.3s Time] [2022-02-10 03:12:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-02-10 03:12:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 765. [2022-02-10 03:12:12,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 2.735602094240838) internal successors, (2090), 764 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2090 transitions. [2022-02-10 03:12:12,700 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2090 transitions. Word has length 26 [2022-02-10 03:12:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:12,700 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2090 transitions. [2022-02-10 03:12:12,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2090 transitions. [2022-02-10 03:12:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:12,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:12,701 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:12,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Ended with exit code 0 [2022-02-10 03:12:12,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-02-10 03:12:12,902 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:12,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1855202815, now seen corresponding path program 425 times [2022-02-10 03:12:12,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:12,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899661921] [2022-02-10 03:12:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:12,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:13,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:13,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899661921] [2022-02-10 03:12:13,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899661921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:13,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979058431] [2022-02-10 03:12:13,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:12:13,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:13,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:13,170 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:13,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-02-10 03:12:13,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:12:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:13,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:13,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:13,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:12:13,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:13,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:12:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:13,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:14,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:14,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 75 [2022-02-10 03:12:14,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:14,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:14,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:14,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:14,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979058431] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:14,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:14,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:14,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857962007] [2022-02-10 03:12:14,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:14,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:14,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:14,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:14,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:14,387 INFO L87 Difference]: Start difference. First operand 765 states and 2090 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:15,102 INFO L93 Difference]: Finished difference Result 884 states and 2303 transitions. [2022-02-10 03:12:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:12:15,102 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:15,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:15,103 INFO L225 Difference]: With dead ends: 884 [2022-02-10 03:12:15,103 INFO L226 Difference]: Without dead ends: 864 [2022-02-10 03:12:15,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 03:12:15,104 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:15,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 216 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 486 Invalid, 0 Unknown, 212 Unchecked, 0.2s Time] [2022-02-10 03:12:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-02-10 03:12:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 770. [2022-02-10 03:12:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 2.730819245773732) internal successors, (2100), 769 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2100 transitions. [2022-02-10 03:12:15,112 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2100 transitions. Word has length 26 [2022-02-10 03:12:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:15,112 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2100 transitions. [2022-02-10 03:12:15,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2100 transitions. [2022-02-10 03:12:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:15,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:15,113 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:15,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Ended with exit code 0 [2022-02-10 03:12:15,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-02-10 03:12:15,313 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash -969404535, now seen corresponding path program 426 times [2022-02-10 03:12:15,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:15,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140488995] [2022-02-10 03:12:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:15,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:15,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:15,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140488995] [2022-02-10 03:12:15,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140488995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:15,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549997732] [2022-02-10 03:12:15,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:12:15,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:15,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:15,574 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:15,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-02-10 03:12:15,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:12:15,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:12:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:15,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:15,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:15,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:15,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:12:15,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:15,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:12:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:16,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:16,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:16,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:12:17,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:17,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:17,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:17,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:17,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549997732] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:17,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:17,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 35 [2022-02-10 03:12:17,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392526160] [2022-02-10 03:12:17,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:17,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-10 03:12:17,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-10 03:12:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:12:17,039 INFO L87 Difference]: Start difference. First operand 770 states and 2100 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:17,671 INFO L93 Difference]: Finished difference Result 816 states and 2192 transitions. [2022-02-10 03:12:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:12:17,671 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:17,672 INFO L225 Difference]: With dead ends: 816 [2022-02-10 03:12:17,672 INFO L226 Difference]: Without dead ends: 811 [2022-02-10 03:12:17,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:12:17,673 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:17,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 182 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 512 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-02-10 03:12:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-02-10 03:12:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 773. [2022-02-10 03:12:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.7305699481865284) internal successors, (2108), 772 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2108 transitions. [2022-02-10 03:12:17,681 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2108 transitions. Word has length 26 [2022-02-10 03:12:17,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:17,681 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 2108 transitions. [2022-02-10 03:12:17,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:17,681 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2108 transitions. [2022-02-10 03:12:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:17,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:17,682 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:17,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:17,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-02-10 03:12:17,883 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash -561498107, now seen corresponding path program 427 times [2022-02-10 03:12:17,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:17,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584833957] [2022-02-10 03:12:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:17,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:18,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:18,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584833957] [2022-02-10 03:12:18,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584833957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:18,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056147209] [2022-02-10 03:12:18,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:12:18,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:18,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:18,095 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:18,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-02-10 03:12:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:18,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:18,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:18,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:18,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:18,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:12:18,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:18,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-10 03:12:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:18,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:18,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:18,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:12:19,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:19,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:12:19,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:19,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:12:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:19,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056147209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:19,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:19,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:19,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454679617] [2022-02-10 03:12:19,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:19,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:19,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:19,305 INFO L87 Difference]: Start difference. First operand 773 states and 2108 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:19,468 INFO L93 Difference]: Finished difference Result 823 states and 2194 transitions. [2022-02-10 03:12:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:12:19,469 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:19,470 INFO L225 Difference]: With dead ends: 823 [2022-02-10 03:12:19,470 INFO L226 Difference]: Without dead ends: 800 [2022-02-10 03:12:19,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:19,470 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:19,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 215 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 371 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-02-10 03:12:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-02-10 03:12:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 775. [2022-02-10 03:12:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 2.731266149870801) internal successors, (2114), 774 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2114 transitions. [2022-02-10 03:12:19,478 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2114 transitions. Word has length 26 [2022-02-10 03:12:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:19,478 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2114 transitions. [2022-02-10 03:12:19,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2114 transitions. [2022-02-10 03:12:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:19,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:19,479 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:19,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Ended with exit code 0 [2022-02-10 03:12:19,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:19,679 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1609866607, now seen corresponding path program 428 times [2022-02-10 03:12:19,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:19,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742490588] [2022-02-10 03:12:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:19,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:19,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:19,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742490588] [2022-02-10 03:12:19,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742490588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:19,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521740715] [2022-02-10 03:12:19,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:12:19,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:19,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:19,950 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:19,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-02-10 03:12:19,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:12:19,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:20,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:20,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:20,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:20,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:12:20,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:20,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:20,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:20,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:20,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-10 03:12:21,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:21,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:21,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:21,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:21,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521740715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:21,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:21,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:12:21,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012667062] [2022-02-10 03:12:21,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:21,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:12:21,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:12:21,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:12:21,085 INFO L87 Difference]: Start difference. First operand 775 states and 2114 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:21,407 INFO L93 Difference]: Finished difference Result 853 states and 2269 transitions. [2022-02-10 03:12:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:12:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:21,408 INFO L225 Difference]: With dead ends: 853 [2022-02-10 03:12:21,408 INFO L226 Difference]: Without dead ends: 848 [2022-02-10 03:12:21,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:12:21,409 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:21,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 220 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 529 Invalid, 0 Unknown, 219 Unchecked, 0.2s Time] [2022-02-10 03:12:21,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-02-10 03:12:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 780. [2022-02-10 03:12:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.730423620025674) internal successors, (2127), 779 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2127 transitions. [2022-02-10 03:12:21,417 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2127 transitions. Word has length 26 [2022-02-10 03:12:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:21,417 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2127 transitions. [2022-02-10 03:12:21,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2127 transitions. [2022-02-10 03:12:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:21,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:21,418 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:21,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-02-10 03:12:21,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2022-02-10 03:12:21,618 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1201960179, now seen corresponding path program 429 times [2022-02-10 03:12:21,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:21,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943906095] [2022-02-10 03:12:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:21,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:21,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:21,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943906095] [2022-02-10 03:12:21,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943906095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:21,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897999305] [2022-02-10 03:12:21,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:12:21,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:21,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:21,851 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:21,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-02-10 03:12:21,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:12:21,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:21,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:22,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:22,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:22,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:22,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-10 03:12:22,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:22,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:22,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:22,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:22,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-02-10 03:12:22,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:22,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:22,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:22,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:22,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897999305] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:22,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:22,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:12:22,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611448889] [2022-02-10 03:12:22,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:22,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:12:22,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:22,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:12:22,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:12:22,920 INFO L87 Difference]: Start difference. First operand 780 states and 2127 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:23,098 INFO L93 Difference]: Finished difference Result 850 states and 2253 transitions. [2022-02-10 03:12:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:12:23,099 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:23,100 INFO L225 Difference]: With dead ends: 850 [2022-02-10 03:12:23,100 INFO L226 Difference]: Without dead ends: 845 [2022-02-10 03:12:23,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:23,100 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:23,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 169 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 355 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2022-02-10 03:12:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-02-10 03:12:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 781. [2022-02-10 03:12:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.732051282051282) internal successors, (2131), 780 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2131 transitions. [2022-02-10 03:12:23,109 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2131 transitions. Word has length 26 [2022-02-10 03:12:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:23,109 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 2131 transitions. [2022-02-10 03:12:23,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2131 transitions. [2022-02-10 03:12:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:23,110 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:23,110 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:23,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Ended with exit code 0 [2022-02-10 03:12:23,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:23,310 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash -367832431, now seen corresponding path program 430 times [2022-02-10 03:12:23,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:23,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220391850] [2022-02-10 03:12:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:23,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:23,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:23,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220391850] [2022-02-10 03:12:23,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220391850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:23,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102820924] [2022-02-10 03:12:23,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:12:23,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:23,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:23,574 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:23,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-02-10 03:12:23,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:12:23,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:23,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:23,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:23,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:23,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:23,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:12:23,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:23,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:24,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:24,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:24,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-02-10 03:12:24,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:24,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:12:24,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:24,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:12:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:25,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102820924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:25,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:25,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:25,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299124472] [2022-02-10 03:12:25,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:25,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:25,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:25,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:25,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:25,021 INFO L87 Difference]: Start difference. First operand 781 states and 2131 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:25,725 INFO L93 Difference]: Finished difference Result 881 states and 2311 transitions. [2022-02-10 03:12:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:12:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:25,727 INFO L225 Difference]: With dead ends: 881 [2022-02-10 03:12:25,727 INFO L226 Difference]: Without dead ends: 857 [2022-02-10 03:12:25,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:12:25,728 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:25,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 233 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 565 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2022-02-10 03:12:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-02-10 03:12:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 785. [2022-02-10 03:12:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.7346938775510203) internal successors, (2144), 784 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2144 transitions. [2022-02-10 03:12:25,736 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2144 transitions. Word has length 26 [2022-02-10 03:12:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:25,736 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2144 transitions. [2022-02-10 03:12:25,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2144 transitions. [2022-02-10 03:12:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:25,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:25,737 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:25,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Ended with exit code 0 [2022-02-10 03:12:25,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2022-02-10 03:12:25,937 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1825421061, now seen corresponding path program 431 times [2022-02-10 03:12:25,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:25,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685886817] [2022-02-10 03:12:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:25,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:26,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:26,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685886817] [2022-02-10 03:12:26,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685886817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:26,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71257340] [2022-02-10 03:12:26,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:12:26,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:26,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:26,183 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:26,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-02-10 03:12:26,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:12:26,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:26,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:26,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:26,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:26,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:26,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:26,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:12:26,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:26,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-02-10 03:12:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:26,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:27,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:27,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:12:27,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:27,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:27,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:27,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:27,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71257340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:27,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:27,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:27,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067965093] [2022-02-10 03:12:27,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:27,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:27,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:27,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:27,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:27,466 INFO L87 Difference]: Start difference. First operand 785 states and 2144 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:27,610 INFO L93 Difference]: Finished difference Result 843 states and 2244 transitions. [2022-02-10 03:12:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:12:27,610 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:27,611 INFO L225 Difference]: With dead ends: 843 [2022-02-10 03:12:27,611 INFO L226 Difference]: Without dead ends: 838 [2022-02-10 03:12:27,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:27,611 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:27,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 210 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 332 Invalid, 0 Unknown, 261 Unchecked, 0.1s Time] [2022-02-10 03:12:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-02-10 03:12:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 783. [2022-02-10 03:12:27,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 2.7365728900255752) internal successors, (2140), 782 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2140 transitions. [2022-02-10 03:12:27,619 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2140 transitions. Word has length 26 [2022-02-10 03:12:27,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:27,619 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 2140 transitions. [2022-02-10 03:12:27,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2140 transitions. [2022-02-10 03:12:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:27,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:27,620 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:27,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Ended with exit code 0 [2022-02-10 03:12:27,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2022-02-10 03:12:27,821 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash 787622935, now seen corresponding path program 432 times [2022-02-10 03:12:27,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:27,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679367805] [2022-02-10 03:12:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:27,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:28,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:28,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679367805] [2022-02-10 03:12:28,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679367805] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:28,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511763131] [2022-02-10 03:12:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:12:28,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:28,073 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:28,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-02-10 03:12:28,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:12:28,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:12:28,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:28,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:28,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:28,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:28,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:28,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:28,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:28,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:29,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:29,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-10 03:12:29,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:29,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:29,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:29,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:29,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511763131] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:29,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:29,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 32 [2022-02-10 03:12:29,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475373816] [2022-02-10 03:12:29,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:29,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:29,411 INFO L87 Difference]: Start difference. First operand 783 states and 2140 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:30,599 INFO L93 Difference]: Finished difference Result 904 states and 2377 transitions. [2022-02-10 03:12:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:12:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:30,601 INFO L225 Difference]: With dead ends: 904 [2022-02-10 03:12:30,601 INFO L226 Difference]: Without dead ends: 889 [2022-02-10 03:12:30,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:12:30,601 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:30,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 333 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 803 Invalid, 0 Unknown, 354 Unchecked, 0.3s Time] [2022-02-10 03:12:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-10 03:12:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 782. [2022-02-10 03:12:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.736235595390525) internal successors, (2137), 781 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2137 transitions. [2022-02-10 03:12:30,610 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2137 transitions. Word has length 26 [2022-02-10 03:12:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:30,610 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2137 transitions. [2022-02-10 03:12:30,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2137 transitions. [2022-02-10 03:12:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:30,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:30,611 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:30,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Ended with exit code 0 [2022-02-10 03:12:30,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:30,811 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1868327769, now seen corresponding path program 433 times [2022-02-10 03:12:30,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:30,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735265824] [2022-02-10 03:12:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:30,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:31,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:31,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735265824] [2022-02-10 03:12:31,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735265824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:31,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257589289] [2022-02-10 03:12:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:12:31,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:31,063 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:31,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-02-10 03:12:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:31,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:31,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:31,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:31,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:12:31,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:31,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:31,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:32,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:32,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:12:32,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:32,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:12:32,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:32,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:12:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:32,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257589289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:32,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:32,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:32,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785309854] [2022-02-10 03:12:32,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:32,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:32,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:32,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:32,487 INFO L87 Difference]: Start difference. First operand 782 states and 2137 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:33,049 INFO L93 Difference]: Finished difference Result 915 states and 2426 transitions. [2022-02-10 03:12:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:12:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:33,051 INFO L225 Difference]: With dead ends: 915 [2022-02-10 03:12:33,051 INFO L226 Difference]: Without dead ends: 896 [2022-02-10 03:12:33,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:12:33,051 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:33,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 295 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 587 Invalid, 0 Unknown, 203 Unchecked, 0.3s Time] [2022-02-10 03:12:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-02-10 03:12:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 786. [2022-02-10 03:12:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.74140127388535) internal successors, (2152), 785 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2152 transitions. [2022-02-10 03:12:33,060 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2152 transitions. Word has length 26 [2022-02-10 03:12:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:33,060 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2152 transitions. [2022-02-10 03:12:33,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2152 transitions. [2022-02-10 03:12:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:33,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:33,061 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:33,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Ended with exit code 0 [2022-02-10 03:12:33,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:33,261 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:33,261 INFO L85 PathProgramCache]: Analyzing trace with hash 324925723, now seen corresponding path program 434 times [2022-02-10 03:12:33,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:33,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050061915] [2022-02-10 03:12:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:33,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:33,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:33,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050061915] [2022-02-10 03:12:33,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050061915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:33,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534648785] [2022-02-10 03:12:33,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:12:33,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:33,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:33,502 INFO L229 MonitoredProcess]: Starting monitored process 436 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:33,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-02-10 03:12:33,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:12:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:33,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:33,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:33,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:33,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:33,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:12:33,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:33,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-02-10 03:12:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:33,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:34,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:34,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:12:34,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:34,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:34,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:34,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:34,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534648785] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:34,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:34,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-10 03:12:34,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138685957] [2022-02-10 03:12:34,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:34,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:12:34,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:12:34,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:12:34,842 INFO L87 Difference]: Start difference. First operand 786 states and 2152 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:35,029 INFO L93 Difference]: Finished difference Result 894 states and 2382 transitions. [2022-02-10 03:12:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:12:35,030 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:35,031 INFO L225 Difference]: With dead ends: 894 [2022-02-10 03:12:35,031 INFO L226 Difference]: Without dead ends: 889 [2022-02-10 03:12:35,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:12:35,031 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:35,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 271 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 423 Invalid, 0 Unknown, 199 Unchecked, 0.2s Time] [2022-02-10 03:12:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-10 03:12:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 786. [2022-02-10 03:12:35,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.74140127388535) internal successors, (2152), 785 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2152 transitions. [2022-02-10 03:12:35,039 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2152 transitions. Word has length 26 [2022-02-10 03:12:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:35,039 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2152 transitions. [2022-02-10 03:12:35,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:35,040 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2152 transitions. [2022-02-10 03:12:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:35,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:35,041 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:35,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:35,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-02-10 03:12:35,241 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:35,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1472127745, now seen corresponding path program 435 times [2022-02-10 03:12:35,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:35,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281974724] [2022-02-10 03:12:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:35,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:35,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:35,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281974724] [2022-02-10 03:12:35,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281974724] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:35,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271661600] [2022-02-10 03:12:35,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:12:35,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:35,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:35,515 INFO L229 MonitoredProcess]: Starting monitored process 437 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:35,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-02-10 03:12:35,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:12:35,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:35,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:35,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:35,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:12:36,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:36,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:12:36,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:36,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:36,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:36,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:36,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:12:37,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:37,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:12:37,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:37,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:12:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:37,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271661600] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:37,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:37,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:37,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19466553] [2022-02-10 03:12:37,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:37,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:37,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:37,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:37,212 INFO L87 Difference]: Start difference. First operand 786 states and 2152 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:37,943 INFO L93 Difference]: Finished difference Result 879 states and 2325 transitions. [2022-02-10 03:12:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:12:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:37,945 INFO L225 Difference]: With dead ends: 879 [2022-02-10 03:12:37,945 INFO L226 Difference]: Without dead ends: 858 [2022-02-10 03:12:37,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:12:37,945 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 91 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:37,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 235 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 662 Invalid, 0 Unknown, 259 Unchecked, 0.3s Time] [2022-02-10 03:12:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-02-10 03:12:37,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 791. [2022-02-10 03:12:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 2.7443037974683544) internal successors, (2168), 790 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2168 transitions. [2022-02-10 03:12:37,954 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2168 transitions. Word has length 26 [2022-02-10 03:12:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:37,954 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 2168 transitions. [2022-02-10 03:12:37,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2168 transitions. [2022-02-10 03:12:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:37,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:37,956 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:37,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:38,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2022-02-10 03:12:38,179 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:38,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1617605943, now seen corresponding path program 436 times [2022-02-10 03:12:38,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:38,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719459684] [2022-02-10 03:12:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:38,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:38,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:38,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719459684] [2022-02-10 03:12:38,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719459684] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:38,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839783385] [2022-02-10 03:12:38,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:12:38,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:38,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:38,450 INFO L229 MonitoredProcess]: Starting monitored process 438 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:38,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-02-10 03:12:38,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:12:38,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:38,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:38,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:38,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:12:38,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:38,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:12:38,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:38,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:12:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:39,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:39,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:39,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:12:40,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:40,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:40,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:40,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:40,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839783385] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:40,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:40,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:12:40,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548052574] [2022-02-10 03:12:40,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:40,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:12:40,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:12:40,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:12:40,074 INFO L87 Difference]: Start difference. First operand 791 states and 2168 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:40,361 INFO L93 Difference]: Finished difference Result 845 states and 2266 transitions. [2022-02-10 03:12:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:12:40,362 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:40,363 INFO L225 Difference]: With dead ends: 845 [2022-02-10 03:12:40,363 INFO L226 Difference]: Without dead ends: 840 [2022-02-10 03:12:40,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:40,363 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:40,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 156 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 543 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-02-10 03:12:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-02-10 03:12:40,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 791. [2022-02-10 03:12:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 2.7443037974683544) internal successors, (2168), 790 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2168 transitions. [2022-02-10 03:12:40,371 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2168 transitions. Word has length 26 [2022-02-10 03:12:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:40,371 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 2168 transitions. [2022-02-10 03:12:40,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2168 transitions. [2022-02-10 03:12:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:40,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:40,373 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:40,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:40,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:40,573 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1839934861, now seen corresponding path program 437 times [2022-02-10 03:12:40,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:40,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765935130] [2022-02-10 03:12:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:40,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:40,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:40,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765935130] [2022-02-10 03:12:40,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765935130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:40,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853068967] [2022-02-10 03:12:40,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:12:40,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:40,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:40,855 INFO L229 MonitoredProcess]: Starting monitored process 439 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:40,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-02-10 03:12:40,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:12:40,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:40,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:40,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:41,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:41,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:41,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:41,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:41,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:41,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:41,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:42,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:42,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:12:42,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:42,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:42,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:42,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:42,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853068967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:42,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:42,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:12:42,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091144635] [2022-02-10 03:12:42,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:42,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:12:42,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:12:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:12:42,435 INFO L87 Difference]: Start difference. First operand 791 states and 2168 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:42,718 INFO L93 Difference]: Finished difference Result 890 states and 2384 transitions. [2022-02-10 03:12:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:12:42,718 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:42,720 INFO L225 Difference]: With dead ends: 890 [2022-02-10 03:12:42,720 INFO L226 Difference]: Without dead ends: 880 [2022-02-10 03:12:42,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:12:42,720 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:42,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 158 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 377 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2022-02-10 03:12:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-02-10 03:12:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 794. [2022-02-10 03:12:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 2.746532156368222) internal successors, (2178), 793 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2178 transitions. [2022-02-10 03:12:42,728 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2178 transitions. Word has length 26 [2022-02-10 03:12:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:42,728 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 2178 transitions. [2022-02-10 03:12:42,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2178 transitions. [2022-02-10 03:12:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:42,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:42,729 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:42,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:42,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2022-02-10 03:12:42,930 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1913890129, now seen corresponding path program 438 times [2022-02-10 03:12:42,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:42,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036695839] [2022-02-10 03:12:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:42,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:43,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:43,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036695839] [2022-02-10 03:12:43,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036695839] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:43,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768133395] [2022-02-10 03:12:43,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:12:43,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:43,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:43,189 INFO L229 MonitoredProcess]: Starting monitored process 440 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:43,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-02-10 03:12:43,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:12:43,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:43,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:43,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:43,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:43,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:43,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:43,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:12:43,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:43,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:43,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:44,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:44,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:12:44,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:44,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:12:44,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:44,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:12:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:44,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768133395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:44,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:44,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:44,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318525634] [2022-02-10 03:12:44,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:44,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:44,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:44,557 INFO L87 Difference]: Start difference. First operand 794 states and 2178 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:45,124 INFO L93 Difference]: Finished difference Result 908 states and 2409 transitions. [2022-02-10 03:12:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:12:45,124 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:45,126 INFO L225 Difference]: With dead ends: 908 [2022-02-10 03:12:45,126 INFO L226 Difference]: Without dead ends: 885 [2022-02-10 03:12:45,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:12:45,126 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:45,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 233 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 575 Invalid, 0 Unknown, 261 Unchecked, 0.3s Time] [2022-02-10 03:12:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-02-10 03:12:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 800. [2022-02-10 03:12:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.74342928660826) internal successors, (2192), 799 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2192 transitions. [2022-02-10 03:12:45,144 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2192 transitions. Word has length 26 [2022-02-10 03:12:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:45,144 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 2192 transitions. [2022-02-10 03:12:45,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2192 transitions. [2022-02-10 03:12:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:45,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:45,145 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:45,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:45,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2022-02-10 03:12:45,345 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:45,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1973170739, now seen corresponding path program 439 times [2022-02-10 03:12:45,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:45,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613100277] [2022-02-10 03:12:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:45,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:45,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:45,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613100277] [2022-02-10 03:12:45,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613100277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:45,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701359478] [2022-02-10 03:12:45,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:12:45,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:45,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:45,575 INFO L229 MonitoredProcess]: Starting monitored process 441 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:45,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-02-10 03:12:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:45,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:45,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:45,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:45,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:45,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:12:45,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:45,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-10 03:12:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:46,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:46,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:46,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:12:46,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:46,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:12:46,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:46,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:12:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:46,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701359478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:46,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:46,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:46,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731579141] [2022-02-10 03:12:46,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:46,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:46,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:46,797 INFO L87 Difference]: Start difference. First operand 800 states and 2192 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:47,009 INFO L93 Difference]: Finished difference Result 855 states and 2285 transitions. [2022-02-10 03:12:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:12:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:47,010 INFO L225 Difference]: With dead ends: 855 [2022-02-10 03:12:47,010 INFO L226 Difference]: Without dead ends: 832 [2022-02-10 03:12:47,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:47,011 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:47,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 263 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 485 Invalid, 0 Unknown, 430 Unchecked, 0.2s Time] [2022-02-10 03:12:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-02-10 03:12:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 803. [2022-02-10 03:12:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 2.745635910224439) internal successors, (2202), 802 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2202 transitions. [2022-02-10 03:12:47,021 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2202 transitions. Word has length 26 [2022-02-10 03:12:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:47,021 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 2202 transitions. [2022-02-10 03:12:47,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2202 transitions. [2022-02-10 03:12:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:47,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:47,022 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:47,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Forceful destruction successful, exit code 0 [2022-02-10 03:12:47,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2022-02-10 03:12:47,222 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1139042991, now seen corresponding path program 440 times [2022-02-10 03:12:47,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:47,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164024552] [2022-02-10 03:12:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:47,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:47,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:47,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164024552] [2022-02-10 03:12:47,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164024552] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:47,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95947922] [2022-02-10 03:12:47,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:12:47,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:47,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:47,483 INFO L229 MonitoredProcess]: Starting monitored process 442 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:47,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-02-10 03:12:47,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:12:47,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:47,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:47,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:47,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:47,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:47,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:47,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:47,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:47,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:47,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:48,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:48,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:12:48,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:48,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:48,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:48,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:48,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95947922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:48,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:48,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-10 03:12:48,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156815683] [2022-02-10 03:12:48,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:48,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:12:48,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:12:48,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:12:48,816 INFO L87 Difference]: Start difference. First operand 803 states and 2202 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:49,046 INFO L93 Difference]: Finished difference Result 862 states and 2306 transitions. [2022-02-10 03:12:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:12:49,047 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:49,048 INFO L225 Difference]: With dead ends: 862 [2022-02-10 03:12:49,048 INFO L226 Difference]: Without dead ends: 857 [2022-02-10 03:12:49,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:12:49,048 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:49,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 172 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 466 Invalid, 0 Unknown, 206 Unchecked, 0.2s Time] [2022-02-10 03:12:49,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-02-10 03:12:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 804. [2022-02-10 03:12:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.7459526774595266) internal successors, (2205), 803 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2205 transitions. [2022-02-10 03:12:49,057 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2205 transitions. Word has length 26 [2022-02-10 03:12:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:49,057 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2205 transitions. [2022-02-10 03:12:49,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2205 transitions. [2022-02-10 03:12:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:49,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:49,059 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:49,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Ended with exit code 0 [2022-02-10 03:12:49,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 442 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2022-02-10 03:12:49,279 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash 336574587, now seen corresponding path program 441 times [2022-02-10 03:12:49,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:49,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514779844] [2022-02-10 03:12:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:49,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:49,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:49,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514779844] [2022-02-10 03:12:49,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514779844] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:49,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464963284] [2022-02-10 03:12:49,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:12:49,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:49,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:49,550 INFO L229 MonitoredProcess]: Starting monitored process 443 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:49,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-02-10 03:12:49,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:12:49,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:49,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:49,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:49,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:12:49,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:49,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:12:49,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:49,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:12:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:50,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:50,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:50,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-10 03:12:51,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:51,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:12:51,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:51,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:12:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:12:51,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464963284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:51,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:51,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:51,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952482043] [2022-02-10 03:12:51,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:51,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:51,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:51,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:51,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:51,099 INFO L87 Difference]: Start difference. First operand 804 states and 2205 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:51,874 INFO L93 Difference]: Finished difference Result 911 states and 2391 transitions. [2022-02-10 03:12:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:12:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:51,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:51,876 INFO L225 Difference]: With dead ends: 911 [2022-02-10 03:12:51,876 INFO L226 Difference]: Without dead ends: 885 [2022-02-10 03:12:51,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:12:51,876 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:51,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 259 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 698 Invalid, 0 Unknown, 219 Unchecked, 0.3s Time] [2022-02-10 03:12:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-02-10 03:12:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 804. [2022-02-10 03:12:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.7447073474470733) internal successors, (2204), 803 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2204 transitions. [2022-02-10 03:12:51,885 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2204 transitions. Word has length 26 [2022-02-10 03:12:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:51,885 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2204 transitions. [2022-02-10 03:12:51,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2204 transitions. [2022-02-10 03:12:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:51,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:51,886 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:51,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Ended with exit code 0 [2022-02-10 03:12:52,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:52,086 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:52,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2135196591, now seen corresponding path program 442 times [2022-02-10 03:12:52,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:52,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820657068] [2022-02-10 03:12:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:52,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:52,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:52,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820657068] [2022-02-10 03:12:52,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820657068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:52,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86480297] [2022-02-10 03:12:52,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:12:52,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:52,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:52,403 INFO L229 MonitoredProcess]: Starting monitored process 444 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:52,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-02-10 03:12:52,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:12:52,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:52,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:12:52,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:52,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:52,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:12:52,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:52,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:12:52,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:52,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:12:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:53,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:53,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:53,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:12:54,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:54,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:12:54,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:54,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:12:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:54,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86480297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:54,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:54,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:54,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922049195] [2022-02-10 03:12:54,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:54,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:54,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:54,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:54,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:54,128 INFO L87 Difference]: Start difference. First operand 804 states and 2204 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:55,228 INFO L93 Difference]: Finished difference Result 963 states and 2521 transitions. [2022-02-10 03:12:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:12:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:55,230 INFO L225 Difference]: With dead ends: 963 [2022-02-10 03:12:55,230 INFO L226 Difference]: Without dead ends: 937 [2022-02-10 03:12:55,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 03:12:55,230 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:55,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 300 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 923 Invalid, 0 Unknown, 218 Unchecked, 0.4s Time] [2022-02-10 03:12:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-02-10 03:12:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 808. [2022-02-10 03:12:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.748451053283767) internal successors, (2218), 807 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2218 transitions. [2022-02-10 03:12:55,239 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2218 transitions. Word has length 26 [2022-02-10 03:12:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:55,239 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 2218 transitions. [2022-02-10 03:12:55,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2218 transitions. [2022-02-10 03:12:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:55,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:55,240 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:55,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Ended with exit code 0 [2022-02-10 03:12:55,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,444 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:55,441 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:55,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1221645983, now seen corresponding path program 443 times [2022-02-10 03:12:55,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:55,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104601768] [2022-02-10 03:12:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:55,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:55,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:55,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104601768] [2022-02-10 03:12:55,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104601768] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:55,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075979061] [2022-02-10 03:12:55,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:12:55,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:55,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:55,735 INFO L229 MonitoredProcess]: Starting monitored process 445 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:55,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-02-10 03:12:55,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:12:55,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:55,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:55,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:55,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:12:56,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:56,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:12:56,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:56,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:12:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:56,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:56,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:56,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:12:57,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:57,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:57,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:57,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:57,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075979061] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:57,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:57,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:12:57,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209479948] [2022-02-10 03:12:57,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:57,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:12:57,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:12:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:12:57,226 INFO L87 Difference]: Start difference. First operand 808 states and 2218 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:57,808 INFO L93 Difference]: Finished difference Result 892 states and 2405 transitions. [2022-02-10 03:12:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:12:57,809 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:57,810 INFO L225 Difference]: With dead ends: 892 [2022-02-10 03:12:57,810 INFO L226 Difference]: Without dead ends: 882 [2022-02-10 03:12:57,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:12:57,810 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:57,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 174 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 502 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-02-10 03:12:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-02-10 03:12:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 808. [2022-02-10 03:12:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.748451053283767) internal successors, (2218), 807 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2218 transitions. [2022-02-10 03:12:57,819 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2218 transitions. Word has length 26 [2022-02-10 03:12:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:57,819 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 2218 transitions. [2022-02-10 03:12:57,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2218 transitions. [2022-02-10 03:12:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:57,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:57,820 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:57,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Ended with exit code 0 [2022-02-10 03:12:58,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,445 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:58,020 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:12:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:12:58,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1029332741, now seen corresponding path program 444 times [2022-02-10 03:12:58,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:12:58,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485611252] [2022-02-10 03:12:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:12:58,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:12:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:12:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:58,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:12:58,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485611252] [2022-02-10 03:12:58,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485611252] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:12:58,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273727895] [2022-02-10 03:12:58,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:12:58,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:12:58,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:12:58,293 INFO L229 MonitoredProcess]: Starting monitored process 446 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:12:58,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-02-10 03:12:58,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:12:58,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:12:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:12:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:12:58,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:58,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:12:58,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:58,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:12:58,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:12:58,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-10 03:12:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:58,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:12:59,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:59,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:12:59,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:59,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:12:59,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:12:59,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:12:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:12:59,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273727895] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:12:59,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:12:59,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-10 03:12:59,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829578740] [2022-02-10 03:12:59,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:12:59,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:12:59,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:12:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:12:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:12:59,741 INFO L87 Difference]: Start difference. First operand 808 states and 2218 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:12:59,960 INFO L93 Difference]: Finished difference Result 901 states and 2422 transitions. [2022-02-10 03:12:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:12:59,960 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:12:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:12:59,961 INFO L225 Difference]: With dead ends: 901 [2022-02-10 03:12:59,961 INFO L226 Difference]: Without dead ends: 896 [2022-02-10 03:12:59,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:12:59,962 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:12:59,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 250 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 505 Invalid, 0 Unknown, 390 Unchecked, 0.2s Time] [2022-02-10 03:12:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-02-10 03:12:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 811. [2022-02-10 03:12:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.754320987654321) internal successors, (2231), 810 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2231 transitions. [2022-02-10 03:12:59,970 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2231 transitions. Word has length 26 [2022-02-10 03:12:59,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:12:59,970 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 2231 transitions. [2022-02-10 03:12:59,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:12:59,970 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2231 transitions. [2022-02-10 03:12:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:12:59,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:12:59,971 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:12:59,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Ended with exit code 0 [2022-02-10 03:13:00,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:00,172 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash -24674879, now seen corresponding path program 445 times [2022-02-10 03:13:00,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:00,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940506343] [2022-02-10 03:13:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:00,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:00,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:00,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940506343] [2022-02-10 03:13:00,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940506343] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:00,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53876087] [2022-02-10 03:13:00,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:13:00,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:00,441 INFO L229 MonitoredProcess]: Starting monitored process 447 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:00,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-02-10 03:13:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:00,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:00,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:00,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:00,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:13:00,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:00,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:13:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:00,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:01,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:01,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:13:01,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:01,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:13:01,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:01,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:13:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:01,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53876087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:01,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:01,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:01,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849984228] [2022-02-10 03:13:01,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:01,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:01,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:01,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:01,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:01,842 INFO L87 Difference]: Start difference. First operand 811 states and 2231 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:02,150 INFO L93 Difference]: Finished difference Result 882 states and 2344 transitions. [2022-02-10 03:13:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:13:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:02,151 INFO L225 Difference]: With dead ends: 882 [2022-02-10 03:13:02,151 INFO L226 Difference]: Without dead ends: 859 [2022-02-10 03:13:02,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:02,152 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:02,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 255 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 628 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2022-02-10 03:13:02,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-02-10 03:13:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 811. [2022-02-10 03:13:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.753086419753086) internal successors, (2230), 810 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2230 transitions. [2022-02-10 03:13:02,160 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2230 transitions. Word has length 26 [2022-02-10 03:13:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:02,160 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 2230 transitions. [2022-02-10 03:13:02,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2230 transitions. [2022-02-10 03:13:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:02,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:02,161 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:02,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Ended with exit code 0 [2022-02-10 03:13:02,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2022-02-10 03:13:02,361 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2011245943, now seen corresponding path program 446 times [2022-02-10 03:13:02,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:02,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955228635] [2022-02-10 03:13:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:02,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:02,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:02,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955228635] [2022-02-10 03:13:02,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955228635] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:02,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019619647] [2022-02-10 03:13:02,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:13:02,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:02,679 INFO L229 MonitoredProcess]: Starting monitored process 448 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:02,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-02-10 03:13:02,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:13:02,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:02,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:02,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:02,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:03,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:03,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:13:03,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:03,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:13:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:03,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:03,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:03,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-10 03:13:04,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:04,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:04,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:04,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:04,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019619647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:04,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:04,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:04,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428176516] [2022-02-10 03:13:04,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:04,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:04,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:04,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:04,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:04,103 INFO L87 Difference]: Start difference. First operand 811 states and 2230 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:04,274 INFO L93 Difference]: Finished difference Result 852 states and 2309 transitions. [2022-02-10 03:13:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:13:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:04,276 INFO L225 Difference]: With dead ends: 852 [2022-02-10 03:13:04,276 INFO L226 Difference]: Without dead ends: 847 [2022-02-10 03:13:04,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:04,276 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:04,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 177 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 346 Invalid, 0 Unknown, 184 Unchecked, 0.1s Time] [2022-02-10 03:13:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-02-10 03:13:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 814. [2022-02-10 03:13:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.7539975399753995) internal successors, (2239), 813 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2239 transitions. [2022-02-10 03:13:04,285 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2239 transitions. Word has length 26 [2022-02-10 03:13:04,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:04,285 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 2239 transitions. [2022-02-10 03:13:04,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:04,285 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2239 transitions. [2022-02-10 03:13:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:04,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:04,286 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:04,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Ended with exit code 0 [2022-02-10 03:13:04,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2022-02-10 03:13:04,486 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:04,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:04,486 INFO L85 PathProgramCache]: Analyzing trace with hash -806012335, now seen corresponding path program 447 times [2022-02-10 03:13:04,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:04,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510074729] [2022-02-10 03:13:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:04,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:04,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:04,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510074729] [2022-02-10 03:13:04,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510074729] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:04,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122761141] [2022-02-10 03:13:04,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:13:04,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:04,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:04,798 INFO L229 MonitoredProcess]: Starting monitored process 449 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:04,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-02-10 03:13:04,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:13:04,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:04,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:05,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:05,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:05,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:13:05,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:05,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:13:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:05,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:06,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:06,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:13:06,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:06,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:06,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:06,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:06,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122761141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:06,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:06,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:06,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604567407] [2022-02-10 03:13:06,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:06,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:06,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:06,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:06,441 INFO L87 Difference]: Start difference. First operand 814 states and 2239 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:06,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:06,736 INFO L93 Difference]: Finished difference Result 870 states and 2336 transitions. [2022-02-10 03:13:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:13:06,736 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:06,738 INFO L225 Difference]: With dead ends: 870 [2022-02-10 03:13:06,738 INFO L226 Difference]: Without dead ends: 865 [2022-02-10 03:13:06,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:06,738 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:06,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 191 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 628 Invalid, 0 Unknown, 329 Unchecked, 0.3s Time] [2022-02-10 03:13:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-02-10 03:13:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 813. [2022-02-10 03:13:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 2.7536945812807883) internal successors, (2236), 812 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2236 transitions. [2022-02-10 03:13:06,746 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2236 transitions. Word has length 26 [2022-02-10 03:13:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:06,747 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 2236 transitions. [2022-02-10 03:13:06,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2236 transitions. [2022-02-10 03:13:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:06,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:06,748 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:06,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Ended with exit code 0 [2022-02-10 03:13:06,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2022-02-10 03:13:06,948 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1028341253, now seen corresponding path program 448 times [2022-02-10 03:13:06,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:06,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344716824] [2022-02-10 03:13:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:06,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:07,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:07,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344716824] [2022-02-10 03:13:07,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344716824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:07,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248515087] [2022-02-10 03:13:07,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:13:07,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:07,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:07,247 INFO L229 MonitoredProcess]: Starting monitored process 450 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:07,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-02-10 03:13:07,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:13:07,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:07,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:07,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:07,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:07,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:07,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:07,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:07,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:07,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:13:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:07,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:08,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:08,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:13:08,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:08,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:13:08,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:08,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:13:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:08,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248515087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:08,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:08,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:08,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460438235] [2022-02-10 03:13:08,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:08,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:08,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:08,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:08,724 INFO L87 Difference]: Start difference. First operand 813 states and 2236 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:09,153 INFO L93 Difference]: Finished difference Result 920 states and 2468 transitions. [2022-02-10 03:13:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:13:09,153 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:09,155 INFO L225 Difference]: With dead ends: 920 [2022-02-10 03:13:09,155 INFO L226 Difference]: Without dead ends: 904 [2022-02-10 03:13:09,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:13:09,155 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:09,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 264 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 563 Invalid, 0 Unknown, 328 Unchecked, 0.2s Time] [2022-02-10 03:13:09,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-02-10 03:13:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 822. [2022-02-10 03:13:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 2.7527405602923265) internal successors, (2260), 821 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2260 transitions. [2022-02-10 03:13:09,163 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2260 transitions. Word has length 26 [2022-02-10 03:13:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:09,163 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 2260 transitions. [2022-02-10 03:13:09,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2260 transitions. [2022-02-10 03:13:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:09,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:09,164 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:09,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Ended with exit code 0 [2022-02-10 03:13:09,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2022-02-10 03:13:09,365 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1161577131, now seen corresponding path program 449 times [2022-02-10 03:13:09,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:09,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939297586] [2022-02-10 03:13:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:09,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:09,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:09,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939297586] [2022-02-10 03:13:09,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939297586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:09,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420313033] [2022-02-10 03:13:09,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:13:09,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:09,595 INFO L229 MonitoredProcess]: Starting monitored process 451 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:09,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-02-10 03:13:09,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:13:09,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:09,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:09,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:09,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:09,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-10 03:13:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:09,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:13:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:10,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:10,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:10,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-02-10 03:13:10,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:10,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:10,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:10,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:10,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420313033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:10,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:10,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:13:10,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511339823] [2022-02-10 03:13:10,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:10,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:13:10,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:13:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:13:10,694 INFO L87 Difference]: Start difference. First operand 822 states and 2260 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:10,854 INFO L93 Difference]: Finished difference Result 875 states and 2356 transitions. [2022-02-10 03:13:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:13:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:10,856 INFO L225 Difference]: With dead ends: 875 [2022-02-10 03:13:10,856 INFO L226 Difference]: Without dead ends: 870 [2022-02-10 03:13:10,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:13:10,856 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:10,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 201 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 374 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-02-10 03:13:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-02-10 03:13:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 824. [2022-02-10 03:13:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.755771567436209) internal successors, (2268), 823 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2268 transitions. [2022-02-10 03:13:10,864 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2268 transitions. Word has length 26 [2022-02-10 03:13:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:10,864 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2268 transitions. [2022-02-10 03:13:10,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2268 transitions. [2022-02-10 03:13:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:10,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:10,865 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:10,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-02-10 03:13:11,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:11,066 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash -327449383, now seen corresponding path program 450 times [2022-02-10 03:13:11,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:11,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991731958] [2022-02-10 03:13:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:11,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:11,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:11,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991731958] [2022-02-10 03:13:11,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991731958] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:11,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133035526] [2022-02-10 03:13:11,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:13:11,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:11,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:11,369 INFO L229 MonitoredProcess]: Starting monitored process 452 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:11,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-02-10 03:13:11,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:13:11,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:11,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:11,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:11,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:11,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:11,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:13:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:11,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:12,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:12,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:13:12,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:12,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:12,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:12,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:12,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133035526] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:12,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:12,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:12,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250521768] [2022-02-10 03:13:12,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:12,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:12,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:12,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:12,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:12,755 INFO L87 Difference]: Start difference. First operand 824 states and 2268 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:13,041 INFO L93 Difference]: Finished difference Result 903 states and 2445 transitions. [2022-02-10 03:13:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:13:13,042 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:13,043 INFO L225 Difference]: With dead ends: 903 [2022-02-10 03:13:13,043 INFO L226 Difference]: Without dead ends: 898 [2022-02-10 03:13:13,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:13,043 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:13,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 261 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 624 Invalid, 0 Unknown, 520 Unchecked, 0.3s Time] [2022-02-10 03:13:13,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-02-10 03:13:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 824. [2022-02-10 03:13:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.755771567436209) internal successors, (2268), 823 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2268 transitions. [2022-02-10 03:13:13,052 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2268 transitions. Word has length 26 [2022-02-10 03:13:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:13,052 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 2268 transitions. [2022-02-10 03:13:13,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2268 transitions. [2022-02-10 03:13:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:13,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:13,053 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:13,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Forceful destruction successful, exit code 0 [2022-02-10 03:13:13,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:13,254 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1865804109, now seen corresponding path program 451 times [2022-02-10 03:13:13,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:13,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810427577] [2022-02-10 03:13:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:13,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:13,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:13,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810427577] [2022-02-10 03:13:13,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810427577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:13,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862992602] [2022-02-10 03:13:13,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:13:13,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:13,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:13,516 INFO L229 MonitoredProcess]: Starting monitored process 453 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:13,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-02-10 03:13:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:13,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:13,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:13,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:13,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:13,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:13,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:13:13,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:13,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-10 03:13:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:14,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:14,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:14,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:13:14,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:14,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:13:14,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:14,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:13:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:14,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862992602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:14,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:14,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:14,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780050488] [2022-02-10 03:13:14,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:14,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:14,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:14,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:14,833 INFO L87 Difference]: Start difference. First operand 824 states and 2268 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:15,075 INFO L93 Difference]: Finished difference Result 914 states and 2419 transitions. [2022-02-10 03:13:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:13:15,075 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:15,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:15,077 INFO L225 Difference]: With dead ends: 914 [2022-02-10 03:13:15,077 INFO L226 Difference]: Without dead ends: 879 [2022-02-10 03:13:15,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:15,077 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:15,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 234 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 565 Invalid, 0 Unknown, 351 Unchecked, 0.2s Time] [2022-02-10 03:13:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-02-10 03:13:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 825. [2022-02-10 03:13:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.754854368932039) internal successors, (2270), 824 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2270 transitions. [2022-02-10 03:13:15,085 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2270 transitions. Word has length 26 [2022-02-10 03:13:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:15,085 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 2270 transitions. [2022-02-10 03:13:15,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2270 transitions. [2022-02-10 03:13:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:15,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:15,087 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:15,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Forceful destruction successful, exit code 0 [2022-02-10 03:13:15,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:15,287 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1323602983, now seen corresponding path program 452 times [2022-02-10 03:13:15,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:15,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533568578] [2022-02-10 03:13:15,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:15,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:15,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:15,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533568578] [2022-02-10 03:13:15,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533568578] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:15,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284639745] [2022-02-10 03:13:15,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:13:15,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:15,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:15,600 INFO L229 MonitoredProcess]: Starting monitored process 454 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:15,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-02-10 03:13:15,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:13:15,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:15,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:15,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:15,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:13:15,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:15,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:13:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:16,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:16,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:16,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:13:17,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:17,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:17,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:17,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:17,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284639745] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:17,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:17,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:17,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603462232] [2022-02-10 03:13:17,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:17,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:17,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:17,104 INFO L87 Difference]: Start difference. First operand 825 states and 2270 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:17,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:17,369 INFO L93 Difference]: Finished difference Result 897 states and 2433 transitions. [2022-02-10 03:13:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:13:17,369 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:17,371 INFO L225 Difference]: With dead ends: 897 [2022-02-10 03:13:17,371 INFO L226 Difference]: Without dead ends: 892 [2022-02-10 03:13:17,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:17,371 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:17,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 145 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 559 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-02-10 03:13:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-02-10 03:13:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 826. [2022-02-10 03:13:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.7563636363636363) internal successors, (2274), 825 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2274 transitions. [2022-02-10 03:13:17,380 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2274 transitions. Word has length 26 [2022-02-10 03:13:17,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:17,380 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2274 transitions. [2022-02-10 03:13:17,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2274 transitions. [2022-02-10 03:13:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:17,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:17,381 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:17,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Ended with exit code 0 [2022-02-10 03:13:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2022-02-10 03:13:17,581 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash 2033239591, now seen corresponding path program 453 times [2022-02-10 03:13:17,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:17,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343063655] [2022-02-10 03:13:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:17,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:17,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:17,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343063655] [2022-02-10 03:13:17,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343063655] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:17,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919787049] [2022-02-10 03:13:17,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:13:17,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:17,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:17,891 INFO L229 MonitoredProcess]: Starting monitored process 455 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:17,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-02-10 03:13:17,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:13:17,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:17,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:18,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:18,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:18,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:18,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:13:18,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:18,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:13:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:18,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:19,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:19,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-02-10 03:13:19,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:19,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:19,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:19,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:19,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919787049] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:19,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:19,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:19,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085543151] [2022-02-10 03:13:19,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:19,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:19,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:19,321 INFO L87 Difference]: Start difference. First operand 826 states and 2274 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:19,915 INFO L93 Difference]: Finished difference Result 894 states and 2402 transitions. [2022-02-10 03:13:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:13:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:19,917 INFO L225 Difference]: With dead ends: 894 [2022-02-10 03:13:19,917 INFO L226 Difference]: Without dead ends: 884 [2022-02-10 03:13:19,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:13:19,918 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:19,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 159 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 406 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-02-10 03:13:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-02-10 03:13:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 826. [2022-02-10 03:13:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.7563636363636363) internal successors, (2274), 825 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2274 transitions. [2022-02-10 03:13:19,926 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2274 transitions. Word has length 26 [2022-02-10 03:13:19,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:19,926 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2274 transitions. [2022-02-10 03:13:19,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2274 transitions. [2022-02-10 03:13:19,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:19,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:19,927 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:19,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Ended with exit code 0 [2022-02-10 03:13:20,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,455 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:20,127 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:20,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1840926349, now seen corresponding path program 454 times [2022-02-10 03:13:20,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:20,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730598474] [2022-02-10 03:13:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:20,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:20,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:20,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730598474] [2022-02-10 03:13:20,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730598474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:20,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072160871] [2022-02-10 03:13:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:13:20,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:20,396 INFO L229 MonitoredProcess]: Starting monitored process 456 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:20,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-02-10 03:13:20,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:13:20,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:20,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:20,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:20,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:20,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:13:20,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:20,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-10 03:13:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:20,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:21,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:21,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:13:21,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:21,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:13:21,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:21,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:13:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:21,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072160871] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:21,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:21,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:13:21,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739918158] [2022-02-10 03:13:21,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:21,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:13:21,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:13:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:13:21,893 INFO L87 Difference]: Start difference. First operand 826 states and 2274 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:22,092 INFO L93 Difference]: Finished difference Result 919 states and 2469 transitions. [2022-02-10 03:13:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:13:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:22,094 INFO L225 Difference]: With dead ends: 919 [2022-02-10 03:13:22,094 INFO L226 Difference]: Without dead ends: 896 [2022-02-10 03:13:22,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:13:22,094 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:22,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 179 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 444 Invalid, 0 Unknown, 250 Unchecked, 0.2s Time] [2022-02-10 03:13:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-02-10 03:13:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 826. [2022-02-10 03:13:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.7563636363636363) internal successors, (2274), 825 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2274 transitions. [2022-02-10 03:13:22,102 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2274 transitions. Word has length 26 [2022-02-10 03:13:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:22,102 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2274 transitions. [2022-02-10 03:13:22,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2274 transitions. [2022-02-10 03:13:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:22,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:22,104 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:22,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Ended with exit code 0 [2022-02-10 03:13:22,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:22,304 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash 786918729, now seen corresponding path program 455 times [2022-02-10 03:13:22,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:22,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649497411] [2022-02-10 03:13:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:22,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:22,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:22,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649497411] [2022-02-10 03:13:22,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649497411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:22,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277993496] [2022-02-10 03:13:22,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:13:22,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:22,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:22,587 INFO L229 MonitoredProcess]: Starting monitored process 457 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:22,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-02-10 03:13:22,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:13:22,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:22,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:22,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:22,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:22,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:22,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:22,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:13:22,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:22,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:13:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:23,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:23,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:23,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:13:23,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:23,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:23,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:23,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:23,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277993496] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:23,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:23,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:23,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710852457] [2022-02-10 03:13:23,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:23,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:23,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:23,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:23,968 INFO L87 Difference]: Start difference. First operand 826 states and 2274 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:24,263 INFO L93 Difference]: Finished difference Result 888 states and 2390 transitions. [2022-02-10 03:13:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:13:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:24,265 INFO L225 Difference]: With dead ends: 888 [2022-02-10 03:13:24,265 INFO L226 Difference]: Without dead ends: 883 [2022-02-10 03:13:24,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:24,265 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:24,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 177 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 668 Invalid, 0 Unknown, 177 Unchecked, 0.3s Time] [2022-02-10 03:13:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-02-10 03:13:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 829. [2022-02-10 03:13:24,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 2.754830917874396) internal successors, (2281), 828 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2281 transitions. [2022-02-10 03:13:24,273 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2281 transitions. Word has length 26 [2022-02-10 03:13:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:24,273 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 2281 transitions. [2022-02-10 03:13:24,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2281 transitions. [2022-02-10 03:13:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:24,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:24,275 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:24,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Ended with exit code 0 [2022-02-10 03:13:24,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:24,475 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash -623066935, now seen corresponding path program 456 times [2022-02-10 03:13:24,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:24,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017281176] [2022-02-10 03:13:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:24,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:24,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:24,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017281176] [2022-02-10 03:13:24,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017281176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:24,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597814965] [2022-02-10 03:13:24,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:13:24,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:24,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:24,772 INFO L229 MonitoredProcess]: Starting monitored process 458 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:24,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-02-10 03:13:24,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 03:13:24,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:24,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:13:24,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:25,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:25,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:25,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:25,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:13:25,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:25,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:13:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:25,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:25,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:25,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 95 [2022-02-10 03:13:26,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:26,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-02-10 03:13:26,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:26,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-10 03:13:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:26,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597814965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:26,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:26,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:26,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721646475] [2022-02-10 03:13:26,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:26,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:26,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:26,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:26,203 INFO L87 Difference]: Start difference. First operand 829 states and 2281 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:26,788 INFO L93 Difference]: Finished difference Result 920 states and 2453 transitions. [2022-02-10 03:13:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:13:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:26,790 INFO L225 Difference]: With dead ends: 920 [2022-02-10 03:13:26,790 INFO L226 Difference]: Without dead ends: 910 [2022-02-10 03:13:26,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:13:26,791 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 107 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:26,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 330 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 745 Invalid, 0 Unknown, 518 Unchecked, 0.3s Time] [2022-02-10 03:13:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-02-10 03:13:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 839. [2022-02-10 03:13:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 2.752983293556086) internal successors, (2307), 838 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2307 transitions. [2022-02-10 03:13:26,799 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2307 transitions. Word has length 26 [2022-02-10 03:13:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:26,799 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 2307 transitions. [2022-02-10 03:13:26,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2307 transitions. [2022-02-10 03:13:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:26,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:26,800 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:26,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Ended with exit code 0 [2022-02-10 03:13:27,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2022-02-10 03:13:27,001 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash -756302813, now seen corresponding path program 457 times [2022-02-10 03:13:27,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:27,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435607754] [2022-02-10 03:13:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:27,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:27,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:27,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435607754] [2022-02-10 03:13:27,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435607754] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:27,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174320640] [2022-02-10 03:13:27,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:13:27,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:27,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:27,217 INFO L229 MonitoredProcess]: Starting monitored process 459 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:27,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-02-10 03:13:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:27,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:27,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:27,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:27,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:13:27,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:27,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-10 03:13:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:27,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:28,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:28,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:13:28,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:28,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-02-10 03:13:28,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:28,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-02-10 03:13:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:28,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174320640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:28,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:28,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:13:28,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187053376] [2022-02-10 03:13:28,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:28,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:13:28,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:28,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:13:28,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:13:28,466 INFO L87 Difference]: Start difference. First operand 839 states and 2307 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:28,702 INFO L93 Difference]: Finished difference Result 931 states and 2470 transitions. [2022-02-10 03:13:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:13:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:28,703 INFO L225 Difference]: With dead ends: 931 [2022-02-10 03:13:28,703 INFO L226 Difference]: Without dead ends: 903 [2022-02-10 03:13:28,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:28,704 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:28,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 205 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 405 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-02-10 03:13:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-02-10 03:13:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 846. [2022-02-10 03:13:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.753846153846154) internal successors, (2327), 845 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2327 transitions. [2022-02-10 03:13:28,712 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2327 transitions. Word has length 26 [2022-02-10 03:13:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:28,712 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 2327 transitions. [2022-02-10 03:13:28,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2327 transitions. [2022-02-10 03:13:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:28,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:28,714 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:28,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Ended with exit code 0 [2022-02-10 03:13:28,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-02-10 03:13:28,914 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash 77824935, now seen corresponding path program 458 times [2022-02-10 03:13:28,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:28,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996244065] [2022-02-10 03:13:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:28,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:29,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:29,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996244065] [2022-02-10 03:13:29,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996244065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:29,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144553431] [2022-02-10 03:13:29,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:13:29,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:29,177 INFO L229 MonitoredProcess]: Starting monitored process 460 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:29,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-02-10 03:13:29,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:13:29,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:29,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:29,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:29,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:29,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:29,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:29,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:13:29,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:29,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:13:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:29,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:30,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:30,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:13:30,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:30,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:30,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:30,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:30,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144553431] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:30,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:30,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:30,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15037443] [2022-02-10 03:13:30,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:30,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:30,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:30,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:30,518 INFO L87 Difference]: Start difference. First operand 846 states and 2327 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:30,809 INFO L93 Difference]: Finished difference Result 927 states and 2507 transitions. [2022-02-10 03:13:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:13:30,809 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:30,811 INFO L225 Difference]: With dead ends: 927 [2022-02-10 03:13:30,811 INFO L226 Difference]: Without dead ends: 922 [2022-02-10 03:13:30,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:30,811 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:30,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 258 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 632 Invalid, 0 Unknown, 455 Unchecked, 0.3s Time] [2022-02-10 03:13:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-02-10 03:13:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 846. [2022-02-10 03:13:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.753846153846154) internal successors, (2327), 845 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2327 transitions. [2022-02-10 03:13:30,820 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2327 transitions. Word has length 26 [2022-02-10 03:13:30,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:30,820 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 2327 transitions. [2022-02-10 03:13:30,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:30,820 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2327 transitions. [2022-02-10 03:13:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:30,821 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:30,821 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:30,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Forceful destruction successful, exit code 0 [2022-02-10 03:13:31,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-02-10 03:13:31,022 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2023888869, now seen corresponding path program 459 times [2022-02-10 03:13:31,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:31,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427295224] [2022-02-10 03:13:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:31,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:31,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:31,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427295224] [2022-02-10 03:13:31,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427295224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:31,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859923839] [2022-02-10 03:13:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:13:31,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:31,266 INFO L229 MonitoredProcess]: Starting monitored process 461 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:31,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-02-10 03:13:31,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 03:13:31,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:31,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:31,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:31,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:31,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:31,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:31,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:13:31,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:31,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-10 03:13:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:31,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:32,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:32,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:13:32,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:32,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:13:32,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:32,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:13:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:32,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859923839] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:32,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:32,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:32,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648259228] [2022-02-10 03:13:32,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:32,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:32,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:32,566 INFO L87 Difference]: Start difference. First operand 846 states and 2327 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:32,791 INFO L93 Difference]: Finished difference Result 944 states and 2528 transitions. [2022-02-10 03:13:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:13:32,791 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:32,793 INFO L225 Difference]: With dead ends: 944 [2022-02-10 03:13:32,793 INFO L226 Difference]: Without dead ends: 914 [2022-02-10 03:13:32,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:32,793 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:32,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 267 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 534 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2022-02-10 03:13:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-02-10 03:13:32,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 843. [2022-02-10 03:13:32,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.7517814726840855) internal successors, (2317), 842 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2317 transitions. [2022-02-10 03:13:32,802 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2317 transitions. Word has length 26 [2022-02-10 03:13:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:32,802 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 2317 transitions. [2022-02-10 03:13:32,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2317 transitions. [2022-02-10 03:13:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:32,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:32,803 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:32,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Forceful destruction successful, exit code 0 [2022-02-10 03:13:33,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2022-02-10 03:13:33,003 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:33,004 INFO L85 PathProgramCache]: Analyzing trace with hash -591647735, now seen corresponding path program 460 times [2022-02-10 03:13:33,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:33,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987302293] [2022-02-10 03:13:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:33,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:33,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:33,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987302293] [2022-02-10 03:13:33,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987302293] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:33,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569191858] [2022-02-10 03:13:33,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:13:33,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:33,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:33,212 INFO L229 MonitoredProcess]: Starting monitored process 462 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:33,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-02-10 03:13:33,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:13:33,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:33,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:33,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:33,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:33,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:13:33,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:33,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-10 03:13:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:33,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:34,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:34,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 135 [2022-02-10 03:13:34,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:34,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:34,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:34,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:34,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569191858] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:34,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:34,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:34,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109989897] [2022-02-10 03:13:34,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:34,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:34,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:34,424 INFO L87 Difference]: Start difference. First operand 843 states and 2317 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:34,641 INFO L93 Difference]: Finished difference Result 932 states and 2504 transitions. [2022-02-10 03:13:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:13:34,641 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:34,643 INFO L225 Difference]: With dead ends: 932 [2022-02-10 03:13:34,643 INFO L226 Difference]: Without dead ends: 922 [2022-02-10 03:13:34,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:34,643 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:34,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 335 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-02-10 03:13:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-02-10 03:13:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 845. [2022-02-10 03:13:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.754739336492891) internal successors, (2325), 844 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2325 transitions. [2022-02-10 03:13:34,652 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2325 transitions. Word has length 26 [2022-02-10 03:13:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:34,652 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2325 transitions. [2022-02-10 03:13:34,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2325 transitions. [2022-02-10 03:13:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:34,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:34,653 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:34,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Ended with exit code 0 [2022-02-10 03:13:34,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:34,853 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1232109807, now seen corresponding path program 461 times [2022-02-10 03:13:34,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:34,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951334765] [2022-02-10 03:13:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:34,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:35,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:35,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951334765] [2022-02-10 03:13:35,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951334765] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:35,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784707347] [2022-02-10 03:13:35,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:13:35,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:35,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:35,107 INFO L229 MonitoredProcess]: Starting monitored process 463 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:35,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-02-10 03:13:35,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:13:35,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:35,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:35,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:13:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:35,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:13:35,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:35,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-10 03:13:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:35,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:36,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:36,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 135 [2022-02-10 03:13:36,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:36,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:36,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:36,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:13:36,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784707347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:36,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:36,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:36,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165141710] [2022-02-10 03:13:36,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:36,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:36,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:36,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:36,529 INFO L87 Difference]: Start difference. First operand 845 states and 2325 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:36,737 INFO L93 Difference]: Finished difference Result 930 states and 2474 transitions. [2022-02-10 03:13:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:13:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:36,739 INFO L225 Difference]: With dead ends: 930 [2022-02-10 03:13:36,739 INFO L226 Difference]: Without dead ends: 925 [2022-02-10 03:13:36,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:36,739 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:36,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 223 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 445 Invalid, 0 Unknown, 431 Unchecked, 0.2s Time] [2022-02-10 03:13:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-02-10 03:13:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 843. [2022-02-10 03:13:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.7517814726840855) internal successors, (2317), 842 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2317 transitions. [2022-02-10 03:13:36,748 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2317 transitions. Word has length 26 [2022-02-10 03:13:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:36,748 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 2317 transitions. [2022-02-10 03:13:36,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2317 transitions. [2022-02-10 03:13:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:36,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:36,749 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:36,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Ended with exit code 0 [2022-02-10 03:13:36,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2022-02-10 03:13:36,949 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:36,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:36,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2003320367, now seen corresponding path program 462 times [2022-02-10 03:13:36,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:36,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697179247] [2022-02-10 03:13:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:36,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:37,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:37,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697179247] [2022-02-10 03:13:37,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697179247] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:37,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96720919] [2022-02-10 03:13:37,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:13:37,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:37,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:37,231 INFO L229 MonitoredProcess]: Starting monitored process 464 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:37,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-02-10 03:13:37,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:13:37,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:37,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:37,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:37,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:37,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:37,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:37,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:13:37,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:37,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-10 03:13:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:37,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:38,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:38,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 135 [2022-02-10 03:13:38,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:38,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:38,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:38,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:38,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96720919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:38,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:38,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:38,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507822639] [2022-02-10 03:13:38,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:38,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:38,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:38,847 INFO L87 Difference]: Start difference. First operand 843 states and 2317 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:39,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:39,145 INFO L93 Difference]: Finished difference Result 946 states and 2504 transitions. [2022-02-10 03:13:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:13:39,145 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:39,146 INFO L225 Difference]: With dead ends: 946 [2022-02-10 03:13:39,146 INFO L226 Difference]: Without dead ends: 936 [2022-02-10 03:13:39,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:39,146 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:39,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 223 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 542 Invalid, 0 Unknown, 303 Unchecked, 0.3s Time] [2022-02-10 03:13:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-02-10 03:13:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 844. [2022-02-10 03:13:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.753262158956109) internal successors, (2321), 843 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2321 transitions. [2022-02-10 03:13:39,155 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2321 transitions. Word has length 26 [2022-02-10 03:13:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:39,155 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 2321 transitions. [2022-02-10 03:13:39,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2321 transitions. [2022-02-10 03:13:39,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:39,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:39,156 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:39,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Ended with exit code 0 [2022-02-10 03:13:39,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2022-02-10 03:13:39,357 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:39,357 INFO L85 PathProgramCache]: Analyzing trace with hash -118648107, now seen corresponding path program 463 times [2022-02-10 03:13:39,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:39,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102075460] [2022-02-10 03:13:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:39,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:39,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:39,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102075460] [2022-02-10 03:13:39,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102075460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:39,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583453098] [2022-02-10 03:13:39,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:13:39,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:39,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:39,636 INFO L229 MonitoredProcess]: Starting monitored process 465 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:39,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-02-10 03:13:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:39,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:39,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:39,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:39,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:40,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:40,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:13:40,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:40,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:13:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:40,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:40,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:40,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 109 [2022-02-10 03:13:41,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:41,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2022-02-10 03:13:41,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:41,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-10 03:13:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:41,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583453098] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:41,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:41,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:41,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524105985] [2022-02-10 03:13:41,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:41,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:41,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:41,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:41,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:41,073 INFO L87 Difference]: Start difference. First operand 844 states and 2321 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:41,422 INFO L93 Difference]: Finished difference Result 901 states and 2418 transitions. [2022-02-10 03:13:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:13:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:41,424 INFO L225 Difference]: With dead ends: 901 [2022-02-10 03:13:41,424 INFO L226 Difference]: Without dead ends: 889 [2022-02-10 03:13:41,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:13:41,424 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:41,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 163 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 643 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-02-10 03:13:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-10 03:13:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 847. [2022-02-10 03:13:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 2.7470449172576834) internal successors, (2324), 846 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2324 transitions. [2022-02-10 03:13:41,432 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2324 transitions. Word has length 26 [2022-02-10 03:13:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:41,433 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 2324 transitions. [2022-02-10 03:13:41,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2324 transitions. [2022-02-10 03:13:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:41,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:41,434 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:41,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Ended with exit code 0 [2022-02-10 03:13:41,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,465 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:41,634 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash -611243869, now seen corresponding path program 464 times [2022-02-10 03:13:41,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:41,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001190143] [2022-02-10 03:13:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:41,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:41,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:41,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001190143] [2022-02-10 03:13:41,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001190143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:41,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572795047] [2022-02-10 03:13:41,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:13:41,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:41,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:41,882 INFO L229 MonitoredProcess]: Starting monitored process 466 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:41,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-02-10 03:13:41,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:13:41,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:41,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:41,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:42,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:42,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:42,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:42,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:13:42,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:42,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:13:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:42,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:43,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:43,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 135 [2022-02-10 03:13:43,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:43,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-02-10 03:13:43,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:43,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-02-10 03:13:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:43,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572795047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:43,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:43,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:43,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451832415] [2022-02-10 03:13:43,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:43,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:43,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:43,318 INFO L87 Difference]: Start difference. First operand 847 states and 2324 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:43,585 INFO L93 Difference]: Finished difference Result 886 states and 2393 transitions. [2022-02-10 03:13:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:13:43,586 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:43,587 INFO L225 Difference]: With dead ends: 886 [2022-02-10 03:13:43,587 INFO L226 Difference]: Without dead ends: 881 [2022-02-10 03:13:43,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:43,588 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:43,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 174 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 614 Invalid, 0 Unknown, 189 Unchecked, 0.3s Time] [2022-02-10 03:13:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-02-10 03:13:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 847. [2022-02-10 03:13:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 2.7470449172576834) internal successors, (2324), 846 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2324 transitions. [2022-02-10 03:13:43,607 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2324 transitions. Word has length 26 [2022-02-10 03:13:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:43,607 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 2324 transitions. [2022-02-10 03:13:43,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2324 transitions. [2022-02-10 03:13:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:43,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:43,608 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:43,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Ended with exit code 0 [2022-02-10 03:13:43,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:43,808 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:43,809 INFO L85 PathProgramCache]: Analyzing trace with hash 336810475, now seen corresponding path program 465 times [2022-02-10 03:13:43,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:43,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835782168] [2022-02-10 03:13:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:43,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:44,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:44,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835782168] [2022-02-10 03:13:44,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835782168] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:44,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653683182] [2022-02-10 03:13:44,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:13:44,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:44,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:44,120 INFO L229 MonitoredProcess]: Starting monitored process 467 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:44,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-02-10 03:13:44,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:13:44,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:44,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:44,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:44,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:44,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:44,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:13:44,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:44,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:13:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:44,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:45,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:45,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 85 [2022-02-10 03:13:45,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:45,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 105 [2022-02-10 03:13:45,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:45,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 83 [2022-02-10 03:13:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:45,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653683182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:45,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:45,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:45,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184067447] [2022-02-10 03:13:45,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:45,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:45,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:45,731 INFO L87 Difference]: Start difference. First operand 847 states and 2324 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:46,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:46,844 INFO L93 Difference]: Finished difference Result 976 states and 2551 transitions. [2022-02-10 03:13:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:13:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:46,846 INFO L225 Difference]: With dead ends: 976 [2022-02-10 03:13:46,846 INFO L226 Difference]: Without dead ends: 940 [2022-02-10 03:13:46,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2022-02-10 03:13:46,846 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:46,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 258 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 734 Invalid, 0 Unknown, 333 Unchecked, 0.4s Time] [2022-02-10 03:13:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-02-10 03:13:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 849. [2022-02-10 03:13:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.7476415094339623) internal successors, (2330), 848 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:46,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2330 transitions. [2022-02-10 03:13:46,857 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2330 transitions. Word has length 26 [2022-02-10 03:13:46,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:46,857 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 2330 transitions. [2022-02-10 03:13:46,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2330 transitions. [2022-02-10 03:13:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:46,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:46,858 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:46,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Ended with exit code 0 [2022-02-10 03:13:47,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:47,059 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:47,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:47,059 INFO L85 PathProgramCache]: Analyzing trace with hash -955653341, now seen corresponding path program 466 times [2022-02-10 03:13:47,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:47,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508244567] [2022-02-10 03:13:47,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:47,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:47,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:47,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508244567] [2022-02-10 03:13:47,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508244567] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:47,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046683371] [2022-02-10 03:13:47,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:13:47,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:47,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:47,360 INFO L229 MonitoredProcess]: Starting monitored process 468 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:47,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-02-10 03:13:47,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:13:47,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:47,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:47,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:47,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:47,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:47,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:47,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:13:47,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:47,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:13:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:48,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:48,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:48,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 77 [2022-02-10 03:13:48,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:48,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 97 [2022-02-10 03:13:48,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:48,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 75 [2022-02-10 03:13:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:48,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046683371] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:48,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:48,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:13:48,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283434932] [2022-02-10 03:13:48,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:48,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:13:48,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:48,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:13:48,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:13:48,998 INFO L87 Difference]: Start difference. First operand 849 states and 2330 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:50,695 INFO L93 Difference]: Finished difference Result 967 states and 2528 transitions. [2022-02-10 03:13:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:13:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:50,697 INFO L225 Difference]: With dead ends: 967 [2022-02-10 03:13:50,697 INFO L226 Difference]: Without dead ends: 931 [2022-02-10 03:13:50,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 03:13:50,697 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:50,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 219 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 736 Invalid, 0 Unknown, 121 Unchecked, 0.4s Time] [2022-02-10 03:13:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-02-10 03:13:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 850. [2022-02-10 03:13:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.7479387514723204) internal successors, (2333), 849 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2333 transitions. [2022-02-10 03:13:50,707 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2333 transitions. Word has length 26 [2022-02-10 03:13:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:50,707 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 2333 transitions. [2022-02-10 03:13:50,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:50,707 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2333 transitions. [2022-02-10 03:13:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:50,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:50,708 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:50,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Ended with exit code 0 [2022-02-10 03:13:50,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2022-02-10 03:13:50,909 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash 249580267, now seen corresponding path program 467 times [2022-02-10 03:13:50,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:50,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882377498] [2022-02-10 03:13:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:50,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:51,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:51,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882377498] [2022-02-10 03:13:51,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882377498] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:51,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012484596] [2022-02-10 03:13:51,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:13:51,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:51,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:51,249 INFO L229 MonitoredProcess]: Starting monitored process 469 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:51,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-02-10 03:13:51,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:13:51,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:51,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:51,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:51,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:51,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:51,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:13:51,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:51,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:13:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:51,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:52,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:52,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 85 [2022-02-10 03:13:52,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:52,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 78 [2022-02-10 03:13:52,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:52,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2022-02-10 03:13:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:52,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012484596] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:52,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:52,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:52,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275565085] [2022-02-10 03:13:52,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:52,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:52,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:52,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:52,872 INFO L87 Difference]: Start difference. First operand 850 states and 2333 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:53,286 INFO L93 Difference]: Finished difference Result 895 states and 2402 transitions. [2022-02-10 03:13:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:13:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:53,288 INFO L225 Difference]: With dead ends: 895 [2022-02-10 03:13:53,288 INFO L226 Difference]: Without dead ends: 890 [2022-02-10 03:13:53,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:13:53,288 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:53,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 191 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 153 Unchecked, 0.3s Time] [2022-02-10 03:13:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-02-10 03:13:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 849. [2022-02-10 03:13:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.7476415094339623) internal successors, (2330), 848 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2330 transitions. [2022-02-10 03:13:53,297 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2330 transitions. Word has length 26 [2022-02-10 03:13:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:53,297 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 2330 transitions. [2022-02-10 03:13:53,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2330 transitions. [2022-02-10 03:13:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:53,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:53,298 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:53,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Ended with exit code 0 [2022-02-10 03:13:53,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-02-10 03:13:53,499 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:53,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:53,499 INFO L85 PathProgramCache]: Analyzing trace with hash -226368563, now seen corresponding path program 468 times [2022-02-10 03:13:53,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:53,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907241746] [2022-02-10 03:13:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:53,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:53,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:53,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907241746] [2022-02-10 03:13:53,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907241746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:53,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964191784] [2022-02-10 03:13:53,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:13:53,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:53,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:53,810 INFO L229 MonitoredProcess]: Starting monitored process 470 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:53,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-02-10 03:13:53,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:13:53,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:53,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:53,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:54,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:54,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:54,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:54,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:13:54,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:54,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:13:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:54,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:55,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:55,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-02-10 03:13:55,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:55,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 140 [2022-02-10 03:13:55,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:55,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 102 [2022-02-10 03:13:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:55,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964191784] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:55,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:55,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:13:55,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999759611] [2022-02-10 03:13:55,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:55,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:13:55,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:55,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:13:55,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:13:55,672 INFO L87 Difference]: Start difference. First operand 849 states and 2330 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:55,926 INFO L93 Difference]: Finished difference Result 898 states and 2411 transitions. [2022-02-10 03:13:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:13:55,926 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:55,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:55,928 INFO L225 Difference]: With dead ends: 898 [2022-02-10 03:13:55,928 INFO L226 Difference]: Without dead ends: 893 [2022-02-10 03:13:55,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:55,928 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:55,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 167 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 481 Invalid, 0 Unknown, 205 Unchecked, 0.2s Time] [2022-02-10 03:13:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-02-10 03:13:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 851. [2022-02-10 03:13:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 2.748235294117647) internal successors, (2336), 850 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2336 transitions. [2022-02-10 03:13:55,937 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2336 transitions. Word has length 26 [2022-02-10 03:13:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:55,937 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2336 transitions. [2022-02-10 03:13:55,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2336 transitions. [2022-02-10 03:13:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:55,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:55,938 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:55,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Ended with exit code 0 [2022-02-10 03:13:56,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2022-02-10 03:13:56,138 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:56,139 INFO L85 PathProgramCache]: Analyzing trace with hash 978865045, now seen corresponding path program 469 times [2022-02-10 03:13:56,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:56,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459501783] [2022-02-10 03:13:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:56,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:56,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:56,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459501783] [2022-02-10 03:13:56,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459501783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:56,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983417181] [2022-02-10 03:13:56,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:13:56,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:56,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:56,465 INFO L229 MonitoredProcess]: Starting monitored process 471 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:56,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-02-10 03:13:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:56,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:13:56,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:13:56,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:56,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:13:56,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:56,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:13:56,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:13:56,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:13:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:57,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:13:57,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:57,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-10 03:13:58,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:58,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 97 [2022-02-10 03:13:58,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:13:58,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 75 [2022-02-10 03:13:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:58,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983417181] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:13:58,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:13:58,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:13:58,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877124329] [2022-02-10 03:13:58,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:13:58,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:13:58,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:13:58,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:13:58,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:13:58,182 INFO L87 Difference]: Start difference. First operand 851 states and 2336 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:13:59,372 INFO L93 Difference]: Finished difference Result 999 states and 2593 transitions. [2022-02-10 03:13:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:13:59,372 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:13:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:13:59,374 INFO L225 Difference]: With dead ends: 999 [2022-02-10 03:13:59,374 INFO L226 Difference]: Without dead ends: 973 [2022-02-10 03:13:59,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2022-02-10 03:13:59,374 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 118 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:13:59,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 337 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1070 Invalid, 0 Unknown, 174 Unchecked, 0.5s Time] [2022-02-10 03:13:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-02-10 03:13:59,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 852. [2022-02-10 03:13:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.7497062279670974) internal successors, (2340), 851 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2340 transitions. [2022-02-10 03:13:59,384 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2340 transitions. Word has length 26 [2022-02-10 03:13:59,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:13:59,384 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2340 transitions. [2022-02-10 03:13:59,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:13:59,384 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2340 transitions. [2022-02-10 03:13:59,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:13:59,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:13:59,385 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:13:59,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Ended with exit code 0 [2022-02-10 03:13:59,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable476,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:59,585 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:13:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:13:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash -521630293, now seen corresponding path program 470 times [2022-02-10 03:13:59,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:13:59,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763885243] [2022-02-10 03:13:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:13:59,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:13:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:13:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:13:59,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:13:59,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763885243] [2022-02-10 03:13:59,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763885243] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:13:59,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704244439] [2022-02-10 03:13:59,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:13:59,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:13:59,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:13:59,908 INFO L229 MonitoredProcess]: Starting monitored process 472 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:13:59,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-02-10 03:13:59,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:13:59,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:13:59,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:13:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:00,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:00,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:00,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:00,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:14:00,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:00,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:14:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:00,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:01,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:01,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-02-10 03:14:01,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:01,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 77 [2022-02-10 03:14:01,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:01,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2022-02-10 03:14:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:01,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704244439] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:01,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:01,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:01,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465847391] [2022-02-10 03:14:01,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:01,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:01,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:01,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:01,502 INFO L87 Difference]: Start difference. First operand 852 states and 2340 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:01,983 INFO L93 Difference]: Finished difference Result 898 states and 2413 transitions. [2022-02-10 03:14:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:14:01,984 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:01,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:01,985 INFO L225 Difference]: With dead ends: 898 [2022-02-10 03:14:01,985 INFO L226 Difference]: Without dead ends: 893 [2022-02-10 03:14:01,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:14:01,985 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:01,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 207 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 744 Invalid, 0 Unknown, 217 Unchecked, 0.3s Time] [2022-02-10 03:14:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-02-10 03:14:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 852. [2022-02-10 03:14:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.7497062279670974) internal successors, (2340), 851 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2340 transitions. [2022-02-10 03:14:01,994 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2340 transitions. Word has length 26 [2022-02-10 03:14:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:01,994 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2340 transitions. [2022-02-10 03:14:01,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2340 transitions. [2022-02-10 03:14:01,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:01,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:01,995 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:02,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Ended with exit code 0 [2022-02-10 03:14:02,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2022-02-10 03:14:02,195 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash 15412445, now seen corresponding path program 471 times [2022-02-10 03:14:02,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:02,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31725972] [2022-02-10 03:14:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:02,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:02,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:02,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31725972] [2022-02-10 03:14:02,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31725972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:02,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176871558] [2022-02-10 03:14:02,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:14:02,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:02,477 INFO L229 MonitoredProcess]: Starting monitored process 473 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:02,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-02-10 03:14:02,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:14:02,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:02,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:02,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:02,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:02,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:03,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:03,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:14:03,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:03,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:14:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:03,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:03,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:03,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 137 [2022-02-10 03:14:04,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:04,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:04,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:04,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:04,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176871558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:04,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:04,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:04,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113985235] [2022-02-10 03:14:04,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:04,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:04,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:04,316 INFO L87 Difference]: Start difference. First operand 852 states and 2340 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:04,571 INFO L93 Difference]: Finished difference Result 904 states and 2429 transitions. [2022-02-10 03:14:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:14:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:04,573 INFO L225 Difference]: With dead ends: 904 [2022-02-10 03:14:04,573 INFO L226 Difference]: Without dead ends: 899 [2022-02-10 03:14:04,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:04,573 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:04,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 166 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 544 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-02-10 03:14:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-02-10 03:14:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 859. [2022-02-10 03:14:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.752913752913753) internal successors, (2362), 858 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:04,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2362 transitions. [2022-02-10 03:14:04,582 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2362 transitions. Word has length 26 [2022-02-10 03:14:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:04,582 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 2362 transitions. [2022-02-10 03:14:04,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2362 transitions. [2022-02-10 03:14:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:04,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:04,583 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:04,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Ended with exit code 0 [2022-02-10 03:14:04,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2022-02-10 03:14:04,783 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:04,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1252173611, now seen corresponding path program 472 times [2022-02-10 03:14:04,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:04,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805708198] [2022-02-10 03:14:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:04,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:05,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:05,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805708198] [2022-02-10 03:14:05,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805708198] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:05,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878994515] [2022-02-10 03:14:05,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:14:05,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:05,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:05,053 INFO L229 MonitoredProcess]: Starting monitored process 474 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:05,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-02-10 03:14:05,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:14:05,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:05,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:05,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:05,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:05,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:05,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:05,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:14:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:05,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:05,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:06,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:06,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 100 [2022-02-10 03:14:06,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:06,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 64 [2022-02-10 03:14:06,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:06,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2022-02-10 03:14:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:06,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878994515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:06,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:06,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:06,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641460955] [2022-02-10 03:14:06,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:06,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:06,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:06,685 INFO L87 Difference]: Start difference. First operand 859 states and 2362 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:07,341 INFO L93 Difference]: Finished difference Result 954 states and 2533 transitions. [2022-02-10 03:14:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:14:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:07,343 INFO L225 Difference]: With dead ends: 954 [2022-02-10 03:14:07,343 INFO L226 Difference]: Without dead ends: 931 [2022-02-10 03:14:07,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:14:07,343 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:07,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 247 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 697 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-02-10 03:14:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-02-10 03:14:07,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 879. [2022-02-10 03:14:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.755125284738041) internal successors, (2419), 878 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2419 transitions. [2022-02-10 03:14:07,352 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2419 transitions. Word has length 26 [2022-02-10 03:14:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:07,353 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 2419 transitions. [2022-02-10 03:14:07,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2419 transitions. [2022-02-10 03:14:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:07,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:07,354 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:07,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Forceful destruction successful, exit code 0 [2022-02-10 03:14:07,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,474 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:07,554 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:07,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1277051371, now seen corresponding path program 473 times [2022-02-10 03:14:07,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:07,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568805437] [2022-02-10 03:14:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:07,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:07,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:07,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568805437] [2022-02-10 03:14:07,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568805437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:07,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370880665] [2022-02-10 03:14:07,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:14:07,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:07,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:07,844 INFO L229 MonitoredProcess]: Starting monitored process 475 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:07,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-02-10 03:14:07,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:14:07,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:07,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:07,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:08,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:08,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:14:08,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:08,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:14:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:08,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:09,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:09,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 83 [2022-02-10 03:14:09,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:09,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:09,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:09,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:09,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370880665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:09,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:09,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:09,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129331819] [2022-02-10 03:14:09,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:09,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:09,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:09,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:09,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:09,395 INFO L87 Difference]: Start difference. First operand 879 states and 2419 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:09,855 INFO L93 Difference]: Finished difference Result 932 states and 2514 transitions. [2022-02-10 03:14:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:14:09,855 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:09,857 INFO L225 Difference]: With dead ends: 932 [2022-02-10 03:14:09,857 INFO L226 Difference]: Without dead ends: 927 [2022-02-10 03:14:09,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:14:09,857 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:09,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 178 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 626 Invalid, 0 Unknown, 210 Unchecked, 0.3s Time] [2022-02-10 03:14:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-02-10 03:14:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 880. [2022-02-10 03:14:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 2.755403868031854) internal successors, (2422), 879 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2422 transitions. [2022-02-10 03:14:09,866 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2422 transitions. Word has length 26 [2022-02-10 03:14:09,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:09,866 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 2422 transitions. [2022-02-10 03:14:09,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2422 transitions. [2022-02-10 03:14:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:09,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:09,867 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:09,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Ended with exit code 0 [2022-02-10 03:14:10,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 475 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2022-02-10 03:14:10,068 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:10,068 INFO L85 PathProgramCache]: Analyzing trace with hash -71817763, now seen corresponding path program 474 times [2022-02-10 03:14:10,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:10,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138532091] [2022-02-10 03:14:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:10,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:10,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:10,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138532091] [2022-02-10 03:14:10,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138532091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:10,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207135488] [2022-02-10 03:14:10,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:14:10,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:10,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:10,402 INFO L229 MonitoredProcess]: Starting monitored process 476 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:10,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-02-10 03:14:10,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:14:10,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:10,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:10,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:10,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:10,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:10,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:10,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:14:10,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:10,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:14:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:11,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:11,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:11,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 83 [2022-02-10 03:14:11,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:11,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:11,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:11,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:12,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207135488] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:12,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:12,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:12,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693468332] [2022-02-10 03:14:12,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:12,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:12,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:12,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:12,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:12,020 INFO L87 Difference]: Start difference. First operand 880 states and 2422 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:12,447 INFO L93 Difference]: Finished difference Result 925 states and 2491 transitions. [2022-02-10 03:14:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:14:12,447 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:12,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:12,448 INFO L225 Difference]: With dead ends: 925 [2022-02-10 03:14:12,449 INFO L226 Difference]: Without dead ends: 920 [2022-02-10 03:14:12,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:14:12,449 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:12,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 178 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 708 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-02-10 03:14:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-02-10 03:14:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 879. [2022-02-10 03:14:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.755125284738041) internal successors, (2419), 878 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2419 transitions. [2022-02-10 03:14:12,457 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2419 transitions. Word has length 26 [2022-02-10 03:14:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:12,457 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 2419 transitions. [2022-02-10 03:14:12,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2419 transitions. [2022-02-10 03:14:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:12,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:12,459 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:12,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Ended with exit code 0 [2022-02-10 03:14:12,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,476 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:12,659 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:12,659 INFO L85 PathProgramCache]: Analyzing trace with hash 420686763, now seen corresponding path program 475 times [2022-02-10 03:14:12,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:12,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644566217] [2022-02-10 03:14:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:12,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:12,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:12,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644566217] [2022-02-10 03:14:12,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644566217] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:12,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303509709] [2022-02-10 03:14:12,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:14:12,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:12,917 INFO L229 MonitoredProcess]: Starting monitored process 477 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:12,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-02-10 03:14:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:12,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:13,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:13,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:13,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:13,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:13,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:13,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:14,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:14,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 100 [2022-02-10 03:14:14,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:14,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 50 [2022-02-10 03:14:14,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:14,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-02-10 03:14:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:14,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303509709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:14,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:14,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:14,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138000429] [2022-02-10 03:14:14,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:14,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:14,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:14,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:14,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:14,395 INFO L87 Difference]: Start difference. First operand 879 states and 2419 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:15,094 INFO L93 Difference]: Finished difference Result 982 states and 2601 transitions. [2022-02-10 03:14:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:14:15,094 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:15,096 INFO L225 Difference]: With dead ends: 982 [2022-02-10 03:14:15,096 INFO L226 Difference]: Without dead ends: 956 [2022-02-10 03:14:15,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:14:15,096 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:15,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 251 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 602 Invalid, 0 Unknown, 171 Unchecked, 0.3s Time] [2022-02-10 03:14:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-02-10 03:14:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 891. [2022-02-10 03:14:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.753932584269663) internal successors, (2451), 890 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2451 transitions. [2022-02-10 03:14:15,106 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2451 transitions. Word has length 26 [2022-02-10 03:14:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:15,106 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2451 transitions. [2022-02-10 03:14:15,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2451 transitions. [2022-02-10 03:14:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:15,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:15,107 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:15,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Ended with exit code 0 [2022-02-10 03:14:15,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,477 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:15,307 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash -846899293, now seen corresponding path program 476 times [2022-02-10 03:14:15,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:15,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729723893] [2022-02-10 03:14:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:15,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:15,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:15,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729723893] [2022-02-10 03:14:15,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729723893] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:15,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058140459] [2022-02-10 03:14:15,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:14:15,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:15,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:15,563 INFO L229 MonitoredProcess]: Starting monitored process 478 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:15,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-02-10 03:14:15,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:14:15,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:15,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:15,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:15,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:15,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:15,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:15,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:15,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:16,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:16,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:16,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 75 [2022-02-10 03:14:16,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:16,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:16,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:16,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:16,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058140459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:16,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:16,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:16,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127238152] [2022-02-10 03:14:16,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:16,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:16,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:16,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:16,835 INFO L87 Difference]: Start difference. First operand 891 states and 2451 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:17,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:17,232 INFO L93 Difference]: Finished difference Result 949 states and 2561 transitions. [2022-02-10 03:14:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:14:17,233 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:17,234 INFO L225 Difference]: With dead ends: 949 [2022-02-10 03:14:17,234 INFO L226 Difference]: Without dead ends: 944 [2022-02-10 03:14:17,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:14:17,235 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:17,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 226 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 620 Invalid, 0 Unknown, 273 Unchecked, 0.3s Time] [2022-02-10 03:14:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-02-10 03:14:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 891. [2022-02-10 03:14:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.753932584269663) internal successors, (2451), 890 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2451 transitions. [2022-02-10 03:14:17,254 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2451 transitions. Word has length 26 [2022-02-10 03:14:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:17,254 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2451 transitions. [2022-02-10 03:14:17,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2451 transitions. [2022-02-10 03:14:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:17,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:17,255 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:17,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Ended with exit code 0 [2022-02-10 03:14:17,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2022-02-10 03:14:17,456 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1710942741, now seen corresponding path program 477 times [2022-02-10 03:14:17,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:17,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822654287] [2022-02-10 03:14:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:17,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:17,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:17,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822654287] [2022-02-10 03:14:17,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822654287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:17,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104788133] [2022-02-10 03:14:17,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:14:17,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:17,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:17,696 INFO L229 MonitoredProcess]: Starting monitored process 479 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:17,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-02-10 03:14:17,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:14:17,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:17,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:17,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:17,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:17,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:18,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:18,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:14:18,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:18,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:18,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:18,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:18,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:14:18,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:18,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:18,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:18,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:18,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104788133] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:18,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:18,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:18,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952942347] [2022-02-10 03:14:18,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:18,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:18,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:18,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:18,886 INFO L87 Difference]: Start difference. First operand 891 states and 2451 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:19,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:19,119 INFO L93 Difference]: Finished difference Result 941 states and 2534 transitions. [2022-02-10 03:14:19,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:14:19,119 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:19,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:19,121 INFO L225 Difference]: With dead ends: 941 [2022-02-10 03:14:19,121 INFO L226 Difference]: Without dead ends: 936 [2022-02-10 03:14:19,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:19,121 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:19,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 208 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 489 Invalid, 0 Unknown, 141 Unchecked, 0.2s Time] [2022-02-10 03:14:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-02-10 03:14:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 893. [2022-02-10 03:14:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.754484304932735) internal successors, (2457), 892 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2457 transitions. [2022-02-10 03:14:19,130 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2457 transitions. Word has length 26 [2022-02-10 03:14:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:19,130 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 2457 transitions. [2022-02-10 03:14:19,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2457 transitions. [2022-02-10 03:14:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:19,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:19,131 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:19,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Ended with exit code 0 [2022-02-10 03:14:19,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,479 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:19,332 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2118849169, now seen corresponding path program 478 times [2022-02-10 03:14:19,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:19,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44848487] [2022-02-10 03:14:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:19,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:19,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:19,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44848487] [2022-02-10 03:14:19,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44848487] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:19,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139005305] [2022-02-10 03:14:19,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:14:19,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:19,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:19,543 INFO L229 MonitoredProcess]: Starting monitored process 480 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:19,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-02-10 03:14:19,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:14:19,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:19,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:19,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:19,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:19,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:14:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:19,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-10 03:14:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:19,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:20,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:20,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:14:20,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:20,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-02-10 03:14:20,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:20,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2022-02-10 03:14:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:20,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139005305] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:20,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:20,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:20,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057210710] [2022-02-10 03:14:20,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:20,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:20,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:20,698 INFO L87 Difference]: Start difference. First operand 893 states and 2457 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:20,933 INFO L93 Difference]: Finished difference Result 953 states and 2550 transitions. [2022-02-10 03:14:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:14:20,934 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:20,935 INFO L225 Difference]: With dead ends: 953 [2022-02-10 03:14:20,935 INFO L226 Difference]: Without dead ends: 930 [2022-02-10 03:14:20,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:20,935 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:20,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 182 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 554 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-02-10 03:14:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-02-10 03:14:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 895. [2022-02-10 03:14:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.7550335570469797) internal successors, (2463), 894 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2463 transitions. [2022-02-10 03:14:20,944 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2463 transitions. Word has length 26 [2022-02-10 03:14:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:20,944 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 2463 transitions. [2022-02-10 03:14:20,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2463 transitions. [2022-02-10 03:14:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:20,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:20,946 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:20,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Ended with exit code 0 [2022-02-10 03:14:21,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,480 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:21,146 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:21,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:21,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1070480669, now seen corresponding path program 479 times [2022-02-10 03:14:21,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:21,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220890906] [2022-02-10 03:14:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:21,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:21,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:21,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220890906] [2022-02-10 03:14:21,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220890906] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:21,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806898346] [2022-02-10 03:14:21,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:14:21,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:21,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:21,401 INFO L229 MonitoredProcess]: Starting monitored process 481 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:21,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-02-10 03:14:21,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:14:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:21,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:21,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:21,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:21,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:21,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:21,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:21,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:21,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:22,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:22,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-10 03:14:22,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:22,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:22,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:22,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:22,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806898346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:22,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:22,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:22,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530386649] [2022-02-10 03:14:22,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:22,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:22,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:22,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:22,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:22,492 INFO L87 Difference]: Start difference. First operand 895 states and 2463 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:22,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:22,916 INFO L93 Difference]: Finished difference Result 982 states and 2633 transitions. [2022-02-10 03:14:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:14:22,916 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:22,917 INFO L225 Difference]: With dead ends: 982 [2022-02-10 03:14:22,917 INFO L226 Difference]: Without dead ends: 972 [2022-02-10 03:14:22,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:14:22,918 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:22,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 297 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 665 Invalid, 0 Unknown, 258 Unchecked, 0.3s Time] [2022-02-10 03:14:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-02-10 03:14:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 900. [2022-02-10 03:14:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.7563959955506117) internal successors, (2478), 899 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2478 transitions. [2022-02-10 03:14:22,927 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2478 transitions. Word has length 26 [2022-02-10 03:14:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:22,927 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2478 transitions. [2022-02-10 03:14:22,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2478 transitions. [2022-02-10 03:14:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:22,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:22,929 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:22,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Ended with exit code 0 [2022-02-10 03:14:23,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2022-02-10 03:14:23,129 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1478387097, now seen corresponding path program 480 times [2022-02-10 03:14:23,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:23,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998435906] [2022-02-10 03:14:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:23,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:23,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:23,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998435906] [2022-02-10 03:14:23,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998435906] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:23,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472932128] [2022-02-10 03:14:23,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:14:23,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:23,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:23,337 INFO L229 MonitoredProcess]: Starting monitored process 482 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:23,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-02-10 03:14:23,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:14:23,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:23,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:14:23,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:23,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:23,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:23,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:23,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-10 03:14:23,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:23,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 03:14:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:14:23,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:24,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:24,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-02-10 03:14:24,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:24,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:24,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:24,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:14:24,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472932128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:24,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:24,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 34 [2022-02-10 03:14:24,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585764496] [2022-02-10 03:14:24,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:24,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-10 03:14:24,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-10 03:14:24,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:14:24,493 INFO L87 Difference]: Start difference. First operand 900 states and 2478 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:24,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:24,953 INFO L93 Difference]: Finished difference Result 949 states and 2557 transitions. [2022-02-10 03:14:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:14:24,953 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:24,954 INFO L225 Difference]: With dead ends: 949 [2022-02-10 03:14:24,954 INFO L226 Difference]: Without dead ends: 944 [2022-02-10 03:14:24,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:14:24,955 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:24,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 195 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 549 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-02-10 03:14:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-02-10 03:14:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 899. [2022-02-10 03:14:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.7583518930957682) internal successors, (2477), 898 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2477 transitions. [2022-02-10 03:14:24,964 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2477 transitions. Word has length 26 [2022-02-10 03:14:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:24,964 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2477 transitions. [2022-02-10 03:14:24,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2477 transitions. [2022-02-10 03:14:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:24,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:24,965 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:24,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Ended with exit code 0 [2022-02-10 03:14:25,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2022-02-10 03:14:25,166 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1982452451, now seen corresponding path program 481 times [2022-02-10 03:14:25,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:25,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47696517] [2022-02-10 03:14:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:25,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:25,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:25,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47696517] [2022-02-10 03:14:25,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47696517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:25,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064227832] [2022-02-10 03:14:25,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:14:25,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:25,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:25,401 INFO L229 MonitoredProcess]: Starting monitored process 483 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:25,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-02-10 03:14:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:25,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:25,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:25,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:25,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:25,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:25,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:25,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:26,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:26,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-10 03:14:26,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:26,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-02-10 03:14:26,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:26,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2022-02-10 03:14:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:26,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064227832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:26,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:26,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:26,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534992584] [2022-02-10 03:14:26,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:26,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:26,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:26,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:26,829 INFO L87 Difference]: Start difference. First operand 899 states and 2477 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:27,511 INFO L93 Difference]: Finished difference Result 1009 states and 2662 transitions. [2022-02-10 03:14:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:14:27,512 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:27,513 INFO L225 Difference]: With dead ends: 1009 [2022-02-10 03:14:27,513 INFO L226 Difference]: Without dead ends: 985 [2022-02-10 03:14:27,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:14:27,514 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:27,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 296 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 750 Invalid, 0 Unknown, 172 Unchecked, 0.3s Time] [2022-02-10 03:14:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-02-10 03:14:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 902. [2022-02-10 03:14:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.7569367369589344) internal successors, (2484), 901 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2484 transitions. [2022-02-10 03:14:27,523 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2484 transitions. Word has length 26 [2022-02-10 03:14:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:27,524 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 2484 transitions. [2022-02-10 03:14:27,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2484 transitions. [2022-02-10 03:14:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:27,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:27,525 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:27,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Ended with exit code 0 [2022-02-10 03:14:27,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 483 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2022-02-10 03:14:27,725 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash 210801041, now seen corresponding path program 482 times [2022-02-10 03:14:27,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:27,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407720493] [2022-02-10 03:14:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:27,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:27,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:27,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407720493] [2022-02-10 03:14:27,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407720493] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:27,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229716039] [2022-02-10 03:14:27,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:14:27,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:27,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:27,960 INFO L229 MonitoredProcess]: Starting monitored process 484 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:27,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-02-10 03:14:27,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:14:27,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:27,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:28,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:28,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:28,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:28,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:14:28,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:28,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-02-10 03:14:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:28,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:28,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:28,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:14:29,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:29,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:29,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:29,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:29,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229716039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:29,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:29,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:29,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13482920] [2022-02-10 03:14:29,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:29,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:29,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:29,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:29,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:29,181 INFO L87 Difference]: Start difference. First operand 902 states and 2484 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:29,343 INFO L93 Difference]: Finished difference Result 950 states and 2559 transitions. [2022-02-10 03:14:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:14:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:29,345 INFO L225 Difference]: With dead ends: 950 [2022-02-10 03:14:29,345 INFO L226 Difference]: Without dead ends: 945 [2022-02-10 03:14:29,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:29,345 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:29,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 203 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 344 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2022-02-10 03:14:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-02-10 03:14:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 904. [2022-02-10 03:14:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.7607973421926912) internal successors, (2493), 903 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2493 transitions. [2022-02-10 03:14:29,354 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2493 transitions. Word has length 26 [2022-02-10 03:14:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:29,354 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2493 transitions. [2022-02-10 03:14:29,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2493 transitions. [2022-02-10 03:14:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:29,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:29,356 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:29,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Ended with exit code 0 [2022-02-10 03:14:29,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,484 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:29,556 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1289694297, now seen corresponding path program 483 times [2022-02-10 03:14:29,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:29,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572198517] [2022-02-10 03:14:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:29,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:29,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:29,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572198517] [2022-02-10 03:14:29,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572198517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:29,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977571877] [2022-02-10 03:14:29,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:14:29,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:29,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:29,796 INFO L229 MonitoredProcess]: Starting monitored process 485 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:29,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-02-10 03:14:29,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:14:29,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:29,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:30,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:30,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:30,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:30,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:14:30,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:30,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-10 03:14:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:30,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:30,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:30,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:14:30,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:30,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 64 [2022-02-10 03:14:30,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:30,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2022-02-10 03:14:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:31,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977571877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:31,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:31,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:31,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389483413] [2022-02-10 03:14:31,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:31,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:31,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:31,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:31,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:31,022 INFO L87 Difference]: Start difference. First operand 904 states and 2493 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:31,360 INFO L93 Difference]: Finished difference Result 998 states and 2649 transitions. [2022-02-10 03:14:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 03:14:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:31,362 INFO L225 Difference]: With dead ends: 998 [2022-02-10 03:14:31,362 INFO L226 Difference]: Without dead ends: 972 [2022-02-10 03:14:31,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:14:31,362 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 59 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:31,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 233 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 633 Invalid, 0 Unknown, 19 Unchecked, 0.3s Time] [2022-02-10 03:14:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-02-10 03:14:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 906. [2022-02-10 03:14:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.760220994475138) internal successors, (2498), 905 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2498 transitions. [2022-02-10 03:14:31,372 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2498 transitions. Word has length 26 [2022-02-10 03:14:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:31,372 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2498 transitions. [2022-02-10 03:14:31,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2498 transitions. [2022-02-10 03:14:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:31,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:31,373 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:31,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Ended with exit code 0 [2022-02-10 03:14:31,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2022-02-10 03:14:31,573 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:31,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2007330211, now seen corresponding path program 484 times [2022-02-10 03:14:31,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:31,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742909301] [2022-02-10 03:14:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:31,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:31,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:31,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742909301] [2022-02-10 03:14:31,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742909301] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:31,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705537128] [2022-02-10 03:14:31,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:14:31,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:31,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:31,840 INFO L229 MonitoredProcess]: Starting monitored process 486 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:31,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-02-10 03:14:31,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:14:31,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:31,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:32,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:32,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:32,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:32,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:14:32,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:32,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:32,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:32,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:32,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:14:33,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:33,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-02-10 03:14:33,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:33,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:14:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:33,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705537128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:33,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:33,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:33,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732630169] [2022-02-10 03:14:33,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:33,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:33,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:33,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:33,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:33,185 INFO L87 Difference]: Start difference. First operand 906 states and 2498 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:33,772 INFO L93 Difference]: Finished difference Result 990 states and 2642 transitions. [2022-02-10 03:14:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 03:14:33,772 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:33,774 INFO L225 Difference]: With dead ends: 990 [2022-02-10 03:14:33,774 INFO L226 Difference]: Without dead ends: 980 [2022-02-10 03:14:33,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:14:33,774 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:33,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 234 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 574 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-02-10 03:14:33,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-02-10 03:14:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 905. [2022-02-10 03:14:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.7599557522123894) internal successors, (2495), 904 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2495 transitions. [2022-02-10 03:14:33,784 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2495 transitions. Word has length 26 [2022-02-10 03:14:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:33,784 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 2495 transitions. [2022-02-10 03:14:33,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2495 transitions. [2022-02-10 03:14:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:33,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:33,785 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:33,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Ended with exit code 0 [2022-02-10 03:14:33,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,486 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:33,986 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash -142492275, now seen corresponding path program 485 times [2022-02-10 03:14:33,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:33,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157028303] [2022-02-10 03:14:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:33,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:34,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:34,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157028303] [2022-02-10 03:14:34,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157028303] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:34,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068154697] [2022-02-10 03:14:34,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:14:34,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:34,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:34,258 INFO L229 MonitoredProcess]: Starting monitored process 487 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:34,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-02-10 03:14:34,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:14:34,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:34,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:34,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:34,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:34,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:34,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:14:34,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:34,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:14:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:34,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:35,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:35,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-10 03:14:35,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:35,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-02-10 03:14:35,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:35,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:14:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:35,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068154697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:35,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:35,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:35,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182541865] [2022-02-10 03:14:35,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:35,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:35,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:35,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:35,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:35,963 INFO L87 Difference]: Start difference. First operand 905 states and 2495 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:36,198 INFO L93 Difference]: Finished difference Result 954 states and 2576 transitions. [2022-02-10 03:14:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:14:36,199 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:36,200 INFO L225 Difference]: With dead ends: 954 [2022-02-10 03:14:36,200 INFO L226 Difference]: Without dead ends: 949 [2022-02-10 03:14:36,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:36,201 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:36,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 161 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 460 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-02-10 03:14:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-02-10 03:14:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 907. [2022-02-10 03:14:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.760485651214128) internal successors, (2501), 906 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2501 transitions. [2022-02-10 03:14:36,210 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2501 transitions. Word has length 26 [2022-02-10 03:14:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:36,210 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 2501 transitions. [2022-02-10 03:14:36,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2501 transitions. [2022-02-10 03:14:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:36,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:36,211 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:36,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Ended with exit code 0 [2022-02-10 03:14:36,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,487 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:36,412 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1062741333, now seen corresponding path program 486 times [2022-02-10 03:14:36,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:36,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24511030] [2022-02-10 03:14:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:36,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:36,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:36,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24511030] [2022-02-10 03:14:36,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24511030] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:36,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216994323] [2022-02-10 03:14:36,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:14:36,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:36,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:36,713 INFO L229 MonitoredProcess]: Starting monitored process 488 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:36,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-02-10 03:14:36,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:14:36,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:36,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:36,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:36,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:36,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:37,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:37,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:14:37,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:37,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:14:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:37,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:37,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:37,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-10 03:14:38,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:38,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:38,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:38,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:38,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216994323] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:38,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:38,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:38,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615569766] [2022-02-10 03:14:38,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:38,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:38,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:38,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:38,135 INFO L87 Difference]: Start difference. First operand 907 states and 2501 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:38,471 INFO L93 Difference]: Finished difference Result 952 states and 2570 transitions. [2022-02-10 03:14:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:14:38,472 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:38,473 INFO L225 Difference]: With dead ends: 952 [2022-02-10 03:14:38,473 INFO L226 Difference]: Without dead ends: 947 [2022-02-10 03:14:38,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:14:38,473 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:38,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 180 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 638 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2022-02-10 03:14:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-02-10 03:14:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 906. [2022-02-10 03:14:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.760220994475138) internal successors, (2498), 905 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2498 transitions. [2022-02-10 03:14:38,482 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2498 transitions. Word has length 26 [2022-02-10 03:14:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:38,482 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2498 transitions. [2022-02-10 03:14:38,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2498 transitions. [2022-02-10 03:14:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:38,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:38,483 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:38,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Ended with exit code 0 [2022-02-10 03:14:38,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,488 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:38,684 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash 840412415, now seen corresponding path program 487 times [2022-02-10 03:14:38,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:38,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025649146] [2022-02-10 03:14:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:38,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:38,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:38,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025649146] [2022-02-10 03:14:38,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025649146] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:38,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541684338] [2022-02-10 03:14:38,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:14:38,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:38,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:38,959 INFO L229 MonitoredProcess]: Starting monitored process 489 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:38,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-02-10 03:14:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:39,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:39,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:39,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:39,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:39,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:39,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:40,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:40,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:14:40,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:40,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-02-10 03:14:40,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:40,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-02-10 03:14:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:40,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541684338] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:40,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:40,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:40,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424724324] [2022-02-10 03:14:40,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:40,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:40,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:40,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:40,423 INFO L87 Difference]: Start difference. First operand 906 states and 2498 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:40,842 INFO L93 Difference]: Finished difference Result 992 states and 2649 transitions. [2022-02-10 03:14:40,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:14:40,842 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:40,844 INFO L225 Difference]: With dead ends: 992 [2022-02-10 03:14:40,844 INFO L226 Difference]: Without dead ends: 971 [2022-02-10 03:14:40,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:14:40,844 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:40,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 202 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 383 Invalid, 0 Unknown, 207 Unchecked, 0.2s Time] [2022-02-10 03:14:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-02-10 03:14:40,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 909. [2022-02-10 03:14:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 2.762114537444934) internal successors, (2508), 908 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 2508 transitions. [2022-02-10 03:14:40,854 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 2508 transitions. Word has length 26 [2022-02-10 03:14:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:40,854 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 2508 transitions. [2022-02-10 03:14:40,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 2508 transitions. [2022-02-10 03:14:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:40,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:40,855 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:40,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Ended with exit code 0 [2022-02-10 03:14:41,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,489 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:41,055 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:41,056 INFO L85 PathProgramCache]: Analyzing trace with hash 299270109, now seen corresponding path program 488 times [2022-02-10 03:14:41,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:41,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76412969] [2022-02-10 03:14:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:41,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:41,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:41,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76412969] [2022-02-10 03:14:41,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76412969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:41,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579871913] [2022-02-10 03:14:41,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:14:41,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:41,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:41,318 INFO L229 MonitoredProcess]: Starting monitored process 490 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:41,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-02-10 03:14:41,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:14:41,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:41,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:41,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:41,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:41,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:41,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:41,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:14:41,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:41,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:41,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:42,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:42,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-10 03:14:42,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:42,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:42,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:42,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:42,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579871913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:42,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:42,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:42,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548088845] [2022-02-10 03:14:42,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:42,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:42,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:42,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:42,412 INFO L87 Difference]: Start difference. First operand 909 states and 2508 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:42,793 INFO L93 Difference]: Finished difference Result 977 states and 2639 transitions. [2022-02-10 03:14:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:14:42,793 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:42,795 INFO L225 Difference]: With dead ends: 977 [2022-02-10 03:14:42,795 INFO L226 Difference]: Without dead ends: 972 [2022-02-10 03:14:42,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:14:42,795 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:42,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 255 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 696 Invalid, 0 Unknown, 223 Unchecked, 0.3s Time] [2022-02-10 03:14:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-02-10 03:14:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 910. [2022-02-10 03:14:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.76017601760176) internal successors, (2509), 909 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2509 transitions. [2022-02-10 03:14:42,804 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2509 transitions. Word has length 26 [2022-02-10 03:14:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:42,804 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2509 transitions. [2022-02-10 03:14:42,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2509 transitions. [2022-02-10 03:14:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:42,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:42,805 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:42,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Ended with exit code 0 [2022-02-10 03:14:43,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,490 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:43,006 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 707176537, now seen corresponding path program 489 times [2022-02-10 03:14:43,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:43,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021352577] [2022-02-10 03:14:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:43,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:43,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:43,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021352577] [2022-02-10 03:14:43,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021352577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:43,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890328954] [2022-02-10 03:14:43,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:14:43,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:43,242 INFO L229 MonitoredProcess]: Starting monitored process 491 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:43,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-02-10 03:14:43,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:14:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:43,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:43,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:43,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:43,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:43,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:14:43,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:43,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-02-10 03:14:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:43,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:44,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:44,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-10 03:14:44,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:44,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 64 [2022-02-10 03:14:44,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:44,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 48 [2022-02-10 03:14:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:44,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890328954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:44,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:44,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:44,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013040452] [2022-02-10 03:14:44,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:44,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:44,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:44,389 INFO L87 Difference]: Start difference. First operand 910 states and 2509 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:44,675 INFO L93 Difference]: Finished difference Result 972 states and 2608 transitions. [2022-02-10 03:14:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:14:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:44,677 INFO L225 Difference]: With dead ends: 972 [2022-02-10 03:14:44,677 INFO L226 Difference]: Without dead ends: 949 [2022-02-10 03:14:44,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:44,677 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:44,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 269 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 686 Invalid, 0 Unknown, 241 Unchecked, 0.3s Time] [2022-02-10 03:14:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-02-10 03:14:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 912. [2022-02-10 03:14:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.760702524698134) internal successors, (2515), 911 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2515 transitions. [2022-02-10 03:14:44,686 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2515 transitions. Word has length 26 [2022-02-10 03:14:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:44,686 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2515 transitions. [2022-02-10 03:14:44,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2515 transitions. [2022-02-10 03:14:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:44,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:44,687 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:44,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Ended with exit code 0 [2022-02-10 03:14:44,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 491 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2022-02-10 03:14:44,888 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1541304285, now seen corresponding path program 490 times [2022-02-10 03:14:44,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:44,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879417305] [2022-02-10 03:14:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:44,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:45,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:45,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879417305] [2022-02-10 03:14:45,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879417305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:45,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671776360] [2022-02-10 03:14:45,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:14:45,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:45,151 INFO L229 MonitoredProcess]: Starting monitored process 492 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:45,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-02-10 03:14:45,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:14:45,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:45,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:45,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:45,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:45,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:45,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:45,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:45,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:45,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:45,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:46,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:46,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:14:46,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:46,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2022-02-10 03:14:46,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:46,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2022-02-10 03:14:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:46,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671776360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:46,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:46,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:46,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081461130] [2022-02-10 03:14:46,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:46,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:46,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:46,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:46,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:46,518 INFO L87 Difference]: Start difference. First operand 912 states and 2515 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:46,994 INFO L93 Difference]: Finished difference Result 986 states and 2637 transitions. [2022-02-10 03:14:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:14:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:46,996 INFO L225 Difference]: With dead ends: 986 [2022-02-10 03:14:46,996 INFO L226 Difference]: Without dead ends: 967 [2022-02-10 03:14:46,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:14:46,996 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:46,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 197 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 495 Invalid, 0 Unknown, 296 Unchecked, 0.2s Time] [2022-02-10 03:14:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-02-10 03:14:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 913. [2022-02-10 03:14:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 2.7609649122807016) internal successors, (2518), 912 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 2518 transitions. [2022-02-10 03:14:47,005 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 2518 transitions. Word has length 26 [2022-02-10 03:14:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:47,006 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 2518 transitions. [2022-02-10 03:14:47,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 2518 transitions. [2022-02-10 03:14:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:47,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:47,007 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:47,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Ended with exit code 0 [2022-02-10 03:14:47,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2022-02-10 03:14:47,207 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1278045433, now seen corresponding path program 491 times [2022-02-10 03:14:47,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:47,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614587715] [2022-02-10 03:14:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:47,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:47,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:47,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614587715] [2022-02-10 03:14:47,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614587715] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:47,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473666747] [2022-02-10 03:14:47,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:14:47,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:47,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:47,480 INFO L229 MonitoredProcess]: Starting monitored process 493 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:47,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-02-10 03:14:47,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:14:47,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:47,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:47,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:47,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:47,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:47,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:47,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:14:47,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:47,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:47,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:48,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:48,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:14:48,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:48,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:48,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:48,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:14:48,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473666747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:48,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:48,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:48,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524968375] [2022-02-10 03:14:48,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:48,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:48,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:48,817 INFO L87 Difference]: Start difference. First operand 913 states and 2518 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:49,456 INFO L93 Difference]: Finished difference Result 983 states and 2637 transitions. [2022-02-10 03:14:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:14:49,456 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:49,458 INFO L225 Difference]: With dead ends: 983 [2022-02-10 03:14:49,458 INFO L226 Difference]: Without dead ends: 973 [2022-02-10 03:14:49,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:14:49,458 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:49,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 250 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 743 Invalid, 0 Unknown, 192 Unchecked, 0.3s Time] [2022-02-10 03:14:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-02-10 03:14:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 912. [2022-02-10 03:14:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.760702524698134) internal successors, (2515), 911 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2515 transitions. [2022-02-10 03:14:49,468 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2515 transitions. Word has length 26 [2022-02-10 03:14:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:49,468 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2515 transitions. [2022-02-10 03:14:49,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2515 transitions. [2022-02-10 03:14:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:49,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:49,469 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:49,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Ended with exit code 0 [2022-02-10 03:14:49,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2022-02-10 03:14:49,669 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:49,670 INFO L85 PathProgramCache]: Analyzing trace with hash 545150685, now seen corresponding path program 492 times [2022-02-10 03:14:49,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:49,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371822801] [2022-02-10 03:14:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:49,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:49,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:49,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371822801] [2022-02-10 03:14:49,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371822801] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:49,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060124708] [2022-02-10 03:14:49,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:14:49,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:49,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:49,978 INFO L229 MonitoredProcess]: Starting monitored process 494 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:49,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-02-10 03:14:50,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:14:50,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:50,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:50,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:50,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:50,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:50,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:14:50,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:50,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:14:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:50,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:51,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:51,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:14:51,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:51,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-02-10 03:14:51,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:51,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:14:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:51,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060124708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:51,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:51,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:51,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326848733] [2022-02-10 03:14:51,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:51,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:51,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:51,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:51,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:51,488 INFO L87 Difference]: Start difference. First operand 912 states and 2515 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:51,791 INFO L93 Difference]: Finished difference Result 956 states and 2584 transitions. [2022-02-10 03:14:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 03:14:51,791 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:51,793 INFO L225 Difference]: With dead ends: 956 [2022-02-10 03:14:51,793 INFO L226 Difference]: Without dead ends: 951 [2022-02-10 03:14:51,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:14:51,793 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:51,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 157 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 651 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-02-10 03:14:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-02-10 03:14:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 913. [2022-02-10 03:14:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 2.762061403508772) internal successors, (2519), 912 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 2519 transitions. [2022-02-10 03:14:51,803 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 2519 transitions. Word has length 26 [2022-02-10 03:14:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:51,803 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 2519 transitions. [2022-02-10 03:14:51,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:51,803 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 2519 transitions. [2022-02-10 03:14:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:51,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:51,804 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:51,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Ended with exit code 0 [2022-02-10 03:14:52,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2022-02-10 03:14:52,005 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:52,005 INFO L85 PathProgramCache]: Analyzing trace with hash -392974037, now seen corresponding path program 493 times [2022-02-10 03:14:52,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:52,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487777705] [2022-02-10 03:14:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:52,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:52,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:52,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487777705] [2022-02-10 03:14:52,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487777705] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:52,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361227146] [2022-02-10 03:14:52,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:14:52,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:52,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:52,294 INFO L229 MonitoredProcess]: Starting monitored process 495 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:52,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-02-10 03:14:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:52,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:52,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:52,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-10 03:14:52,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:52,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:14:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:52,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:53,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:53,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:14:53,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:53,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2022-02-10 03:14:53,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:53,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2022-02-10 03:14:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:53,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361227146] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:53,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:53,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:53,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439678426] [2022-02-10 03:14:53,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:53,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:53,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:53,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:53,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:53,793 INFO L87 Difference]: Start difference. First operand 913 states and 2519 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:54,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:54,288 INFO L93 Difference]: Finished difference Result 997 states and 2673 transitions. [2022-02-10 03:14:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:14:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:54,290 INFO L225 Difference]: With dead ends: 997 [2022-02-10 03:14:54,290 INFO L226 Difference]: Without dead ends: 978 [2022-02-10 03:14:54,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:14:54,290 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:54,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 207 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 625 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-02-10 03:14:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-02-10 03:14:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 914. [2022-02-10 03:14:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.76341730558598) internal successors, (2523), 913 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2523 transitions. [2022-02-10 03:14:54,300 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2523 transitions. Word has length 26 [2022-02-10 03:14:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:54,300 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2523 transitions. [2022-02-10 03:14:54,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2523 transitions. [2022-02-10 03:14:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:54,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:54,301 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:54,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Ended with exit code 0 [2022-02-10 03:14:54,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2022-02-10 03:14:54,502 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash -585287279, now seen corresponding path program 494 times [2022-02-10 03:14:54,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:54,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056894673] [2022-02-10 03:14:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:54,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:54,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:54,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056894673] [2022-02-10 03:14:54,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056894673] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:54,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382662315] [2022-02-10 03:14:54,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:14:54,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:54,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:54,763 INFO L229 MonitoredProcess]: Starting monitored process 496 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:54,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-02-10 03:14:54,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:14:54,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:54,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:54,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:54,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:54,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:55,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:55,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-10 03:14:55,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:55,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-10 03:14:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:55,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:55,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:55,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-10 03:14:56,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:56,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:56,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:56,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:56,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382662315] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:56,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:56,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:14:56,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285245604] [2022-02-10 03:14:56,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:56,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:14:56,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:14:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:56,224 INFO L87 Difference]: Start difference. First operand 914 states and 2523 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:56,359 INFO L93 Difference]: Finished difference Result 977 states and 2631 transitions. [2022-02-10 03:14:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:14:56,360 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:56,361 INFO L225 Difference]: With dead ends: 977 [2022-02-10 03:14:56,361 INFO L226 Difference]: Without dead ends: 972 [2022-02-10 03:14:56,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:14:56,361 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:56,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 231 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 296 Invalid, 0 Unknown, 198 Unchecked, 0.1s Time] [2022-02-10 03:14:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-02-10 03:14:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 914. [2022-02-10 03:14:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.76341730558598) internal successors, (2523), 913 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2523 transitions. [2022-02-10 03:14:56,370 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2523 transitions. Word has length 26 [2022-02-10 03:14:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:56,371 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2523 transitions. [2022-02-10 03:14:56,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2523 transitions. [2022-02-10 03:14:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:56,372 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:56,372 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:56,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Ended with exit code 0 [2022-02-10 03:14:56,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2022-02-10 03:14:56,572 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1639294899, now seen corresponding path program 495 times [2022-02-10 03:14:56,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:56,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328886770] [2022-02-10 03:14:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:56,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:56,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:56,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328886770] [2022-02-10 03:14:56,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328886770] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:56,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120382866] [2022-02-10 03:14:56,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:14:56,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:56,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:56,817 INFO L229 MonitoredProcess]: Starting monitored process 497 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:56,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-02-10 03:14:56,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:14:56,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:56,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:14:56,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:57,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:57,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:57,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:57,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-10 03:14:57,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:57,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:14:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:57,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:14:57,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:57,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-02-10 03:14:58,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:58,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-02-10 03:14:58,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:14:58,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2022-02-10 03:14:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:58,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120382866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:14:58,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:14:58,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:14:58,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285454963] [2022-02-10 03:14:58,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:14:58,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:14:58,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:14:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:14:58,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:14:58,146 INFO L87 Difference]: Start difference. First operand 914 states and 2523 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:14:58,601 INFO L93 Difference]: Finished difference Result 969 states and 2603 transitions. [2022-02-10 03:14:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:14:58,601 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:14:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:14:58,603 INFO L225 Difference]: With dead ends: 969 [2022-02-10 03:14:58,603 INFO L226 Difference]: Without dead ends: 946 [2022-02-10 03:14:58,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:14:58,603 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:14:58,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 182 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 624 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-02-10 03:14:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-02-10 03:14:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 914. [2022-02-10 03:14:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.7623220153340635) internal successors, (2522), 913 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2522 transitions. [2022-02-10 03:14:58,612 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2522 transitions. Word has length 26 [2022-02-10 03:14:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:14:58,612 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2522 transitions. [2022-02-10 03:14:58,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:14:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2522 transitions. [2022-02-10 03:14:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:14:58,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:14:58,613 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:14:58,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Ended with exit code 0 [2022-02-10 03:14:58,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2022-02-10 03:14:58,814 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:14:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:14:58,814 INFO L85 PathProgramCache]: Analyzing trace with hash 585225045, now seen corresponding path program 496 times [2022-02-10 03:14:58,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:14:58,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471748425] [2022-02-10 03:14:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:14:58,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:14:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:14:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:59,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:14:59,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471748425] [2022-02-10 03:14:59,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471748425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:14:59,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410471032] [2022-02-10 03:14:59,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:14:59,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:14:59,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:14:59,118 INFO L229 MonitoredProcess]: Starting monitored process 498 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:14:59,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-02-10 03:14:59,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:14:59,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:14:59,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:14:59,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:14:59,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:59,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:14:59,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:59,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:14:59,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:14:59,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:14:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:14:59,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:15:00,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:00,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-10 03:15:00,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:00,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 97 [2022-02-10 03:15:00,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:00,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 77 [2022-02-10 03:15:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:00,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410471032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:15:00,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:15:00,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:15:00,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283803907] [2022-02-10 03:15:00,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:15:00,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:15:00,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:15:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:15:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:15:00,685 INFO L87 Difference]: Start difference. First operand 914 states and 2522 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:15:01,965 INFO L93 Difference]: Finished difference Result 1128 states and 2919 transitions. [2022-02-10 03:15:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:15:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:15:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:15:01,967 INFO L225 Difference]: With dead ends: 1128 [2022-02-10 03:15:01,967 INFO L226 Difference]: Without dead ends: 1102 [2022-02-10 03:15:01,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 03:15:01,968 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 136 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:15:01,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 489 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1228 Invalid, 0 Unknown, 281 Unchecked, 0.5s Time] [2022-02-10 03:15:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-02-10 03:15:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 933. [2022-02-10 03:15:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.778969957081545) internal successors, (2590), 932 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2590 transitions. [2022-02-10 03:15:01,979 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2590 transitions. Word has length 26 [2022-02-10 03:15:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:15:01,979 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 2590 transitions. [2022-02-10 03:15:01,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2590 transitions. [2022-02-10 03:15:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:15:01,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:15:01,980 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:15:01,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Forceful destruction successful, exit code 0 [2022-02-10 03:15:02,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,498 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:02,180 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:15:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:15:02,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1790458653, now seen corresponding path program 497 times [2022-02-10 03:15:02,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:15:02,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279942526] [2022-02-10 03:15:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:15:02,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:15:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:15:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:02,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:15:02,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279942526] [2022-02-10 03:15:02,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279942526] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:15:02,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189679693] [2022-02-10 03:15:02,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:15:02,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:02,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:15:02,509 INFO L229 MonitoredProcess]: Starting monitored process 499 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:15:02,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-02-10 03:15:02,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:15:02,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:15:02,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:15:02,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:15:02,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:02,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:15:02,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:02,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:15:02,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:02,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:15:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:02,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:15:03,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:03,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-10 03:15:03,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:03,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 68 [2022-02-10 03:15:03,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:03,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2022-02-10 03:15:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:03,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189679693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:15:03,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:15:03,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:15:03,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390861173] [2022-02-10 03:15:03,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:15:03,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:15:03,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:15:03,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:15:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:15:03,908 INFO L87 Difference]: Start difference. First operand 933 states and 2590 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:15:04,971 INFO L93 Difference]: Finished difference Result 1056 states and 2822 transitions. [2022-02-10 03:15:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:15:04,972 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:15:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:15:04,973 INFO L225 Difference]: With dead ends: 1056 [2022-02-10 03:15:04,973 INFO L226 Difference]: Without dead ends: 1046 [2022-02-10 03:15:04,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 03:15:04,973 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:15:04,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 340 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1359 Invalid, 0 Unknown, 77 Unchecked, 0.6s Time] [2022-02-10 03:15:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-02-10 03:15:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 931. [2022-02-10 03:15:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.7774193548387096) internal successors, (2583), 930 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2583 transitions. [2022-02-10 03:15:04,983 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2583 transitions. Word has length 26 [2022-02-10 03:15:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:15:04,983 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 2583 transitions. [2022-02-10 03:15:04,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2583 transitions. [2022-02-10 03:15:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:15:04,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:15:04,985 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:15:05,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Ended with exit code 0 [2022-02-10 03:15:05,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,499 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:05,185 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:15:05,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:15:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash 289963315, now seen corresponding path program 498 times [2022-02-10 03:15:05,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:15:05,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756709482] [2022-02-10 03:15:05,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:15:05,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:15:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:15:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:05,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:15:05,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756709482] [2022-02-10 03:15:05,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756709482] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:15:05,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920587832] [2022-02-10 03:15:05,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:15:05,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:05,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:15:05,456 INFO L229 MonitoredProcess]: Starting monitored process 500 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:15:05,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-02-10 03:15:05,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:15:05,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:15:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:15:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:15:05,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:05,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:15:05,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:05,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-10 03:15:05,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:05,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:15:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:05,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:15:06,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:06,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 97 [2022-02-10 03:15:06,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:06,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-02-10 03:15:06,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:06,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-02-10 03:15:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:06,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920587832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:15:06,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:15:06,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:15:06,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103849434] [2022-02-10 03:15:06,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:15:06,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:15:06,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:15:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:15:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:15:06,983 INFO L87 Difference]: Start difference. First operand 931 states and 2583 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:15:07,561 INFO L93 Difference]: Finished difference Result 1008 states and 2722 transitions. [2022-02-10 03:15:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:15:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:15:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:15:07,563 INFO L225 Difference]: With dead ends: 1008 [2022-02-10 03:15:07,563 INFO L226 Difference]: Without dead ends: 998 [2022-02-10 03:15:07,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:15:07,563 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:15:07,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 221 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 884 Invalid, 0 Unknown, 217 Unchecked, 0.4s Time] [2022-02-10 03:15:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-02-10 03:15:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 931. [2022-02-10 03:15:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.7774193548387096) internal successors, (2583), 930 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2583 transitions. [2022-02-10 03:15:07,573 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2583 transitions. Word has length 26 [2022-02-10 03:15:07,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:15:07,573 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 2583 transitions. [2022-02-10 03:15:07,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2583 transitions. [2022-02-10 03:15:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:15:07,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:15:07,574 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:15:07,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Forceful destruction successful, exit code 0 [2022-02-10 03:15:07,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,500 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:07,774 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:15:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:15:07,775 INFO L85 PathProgramCache]: Analyzing trace with hash 990499363, now seen corresponding path program 499 times [2022-02-10 03:15:07,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:15:07,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765267534] [2022-02-10 03:15:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:15:07,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:15:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:15:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:08,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:15:08,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765267534] [2022-02-10 03:15:08,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765267534] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:15:08,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729541873] [2022-02-10 03:15:08,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:15:08,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:08,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:15:08,032 INFO L229 MonitoredProcess]: Starting monitored process 501 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:15:08,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-02-10 03:15:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:15:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:15:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:15:08,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:08,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:15:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:08,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:15:08,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:08,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-10 03:15:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:08,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:15:09,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:09,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-10 03:15:09,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:09,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2022-02-10 03:15:09,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:09,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 46 [2022-02-10 03:15:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:09,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729541873] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:15:09,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:15:09,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:15:09,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328426034] [2022-02-10 03:15:09,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:15:09,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:15:09,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:15:09,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:15:09,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:15:09,610 INFO L87 Difference]: Start difference. First operand 931 states and 2583 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:15:10,615 INFO L93 Difference]: Finished difference Result 1078 states and 2818 transitions. [2022-02-10 03:15:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:15:10,615 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:15:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:15:10,617 INFO L225 Difference]: With dead ends: 1078 [2022-02-10 03:15:10,617 INFO L226 Difference]: Without dead ends: 1057 [2022-02-10 03:15:10,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 03:15:10,618 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 162 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:15:10,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 460 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1235 Invalid, 0 Unknown, 132 Unchecked, 0.5s Time] [2022-02-10 03:15:10,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-02-10 03:15:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 931. [2022-02-10 03:15:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.7774193548387096) internal successors, (2583), 930 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2583 transitions. [2022-02-10 03:15:10,628 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2583 transitions. Word has length 26 [2022-02-10 03:15:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:15:10,628 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 2583 transitions. [2022-02-10 03:15:10,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2583 transitions. [2022-02-10 03:15:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:15:10,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:15:10,629 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:15:10,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Ended with exit code 0 [2022-02-10 03:15:10,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2022-02-10 03:15:10,830 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:15:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:15:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2099234325, now seen corresponding path program 500 times [2022-02-10 03:15:10,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:15:10,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362630850] [2022-02-10 03:15:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:15:10,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:15:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:15:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:11,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:15:11,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362630850] [2022-02-10 03:15:11,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362630850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:15:11,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820506162] [2022-02-10 03:15:11,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:15:11,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:11,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:15:11,156 INFO L229 MonitoredProcess]: Starting monitored process 502 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:15:11,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-02-10 03:15:11,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:15:11,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:15:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:15:11,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:15:11,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:11,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-10 03:15:11,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:11,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-10 03:15:11,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:11,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-10 03:15:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:11,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:15:12,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:12,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-10 03:15:12,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:12,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-10 03:15:12,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:12,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-10 03:15:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:12,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820506162] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:15:12,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:15:12,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-10 03:15:12,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653695830] [2022-02-10 03:15:12,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:15:12,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:15:12,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:15:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:15:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:15:12,589 INFO L87 Difference]: Start difference. First operand 931 states and 2583 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:15:13,614 INFO L93 Difference]: Finished difference Result 1030 states and 2737 transitions. [2022-02-10 03:15:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:15:13,614 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:15:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:15:13,616 INFO L225 Difference]: With dead ends: 1030 [2022-02-10 03:15:13,616 INFO L226 Difference]: Without dead ends: 1015 [2022-02-10 03:15:13,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=218, Invalid=1762, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:15:13,616 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:15:13,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 257 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 942 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-02-10 03:15:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-02-10 03:15:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 937. [2022-02-10 03:15:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.78525641025641) internal successors, (2607), 936 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2607 transitions. [2022-02-10 03:15:13,626 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2607 transitions. Word has length 26 [2022-02-10 03:15:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:15:13,626 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 2607 transitions. [2022-02-10 03:15:13,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2607 transitions. [2022-02-10 03:15:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:15:13,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:15:13,627 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:15:13,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Forceful destruction successful, exit code 0 [2022-02-10 03:15:13,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,502 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:13,828 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:15:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:15:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1973404053, now seen corresponding path program 501 times [2022-02-10 03:15:13,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:15:13,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703288966] [2022-02-10 03:15:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:15:13,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:15:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:15:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:14,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:15:14,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703288966] [2022-02-10 03:15:14,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703288966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:15:14,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069389814] [2022-02-10 03:15:14,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:15:14,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:15:14,136 INFO L229 MonitoredProcess]: Starting monitored process 503 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:15:14,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-02-10 03:15:14,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:15:14,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:15:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:15:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:15:14,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:14,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:15:14,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:14,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-10 03:15:14,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:14,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:15:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:14,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:15:15,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:15,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-10 03:15:15,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:15,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-02-10 03:15:15,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:15:15,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2022-02-10 03:15:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:15,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069389814] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:15:15,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:15:15,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-10 03:15:15,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162380850] [2022-02-10 03:15:15,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:15:15,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-10 03:15:15,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:15:15,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-10 03:15:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:15:15,563 INFO L87 Difference]: Start difference. First operand 937 states and 2607 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:15:16,491 INFO L93 Difference]: Finished difference Result 1110 states and 2901 transitions. [2022-02-10 03:15:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:15:16,491 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:15:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:15:16,493 INFO L225 Difference]: With dead ends: 1110 [2022-02-10 03:15:16,493 INFO L226 Difference]: Without dead ends: 1084 [2022-02-10 03:15:16,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 03:15:16,494 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 117 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:15:16,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 505 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1069 Invalid, 0 Unknown, 83 Unchecked, 0.4s Time] [2022-02-10 03:15:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-02-10 03:15:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 941. [2022-02-10 03:15:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 2.7893617021276595) internal successors, (2622), 940 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2622 transitions. [2022-02-10 03:15:16,504 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2622 transitions. Word has length 26 [2022-02-10 03:15:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:15:16,504 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 2622 transitions. [2022-02-10 03:15:16,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:15:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2622 transitions. [2022-02-10 03:15:16,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:15:16,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:15:16,505 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:15:16,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Ended with exit code 0 [2022-02-10 03:15:16,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,503 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:16,706 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:15:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:15:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1432261747, now seen corresponding path program 502 times [2022-02-10 03:15:16,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:15:16,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198559623] [2022-02-10 03:15:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:15:16,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:15:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:15:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:16,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:15:16,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198559623] [2022-02-10 03:15:16,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198559623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:15:16,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078689695] [2022-02-10 03:15:16,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:15:16,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:16,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:15:16,976 INFO L229 MonitoredProcess]: Starting monitored process 504 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:15:16,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-02-10 03:15:17,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:15:17,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:15:17,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-10 03:15:17,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:15:17,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:17,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:15:17,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:17,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-10 03:15:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:15:17,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-10 03:15:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:15:17,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-02-10 03:15:17,705 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:15:17,707 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-10 03:15:17,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Forceful destruction successful, exit code 0 [2022-02-10 03:15:17,728 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:15:17,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,504 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:15:17,908 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. [2022-02-10 03:15:17,910 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-10 03:15:17,910 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-10 03:15:17,911 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-10 03:15:17,913 INFO L732 BasicCegarLoop]: Path program histogram: [502, 3, 2, 2, 1] [2022-02-10 03:15:17,917 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 03:15:17,917 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 03:15:17,919 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 03:15:17 BasicIcfg [2022-02-10 03:15:17,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 03:15:17,920 INFO L158 Benchmark]: Toolchain (without parser) took 756980.26ms. Allocated memory was 195.0MB in the beginning and 620.8MB in the end (delta: 425.7MB). Free memory was 155.3MB in the beginning and 467.3MB in the end (delta: -312.0MB). Peak memory consumption was 114.8MB. Max. memory is 8.0GB. [2022-02-10 03:15:17,920 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 195.0MB. Free memory was 156.5MB in the beginning and 156.5MB in the end (delta: 56.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:15:17,920 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.48ms. Allocated memory is still 195.0MB. Free memory was 155.2MB in the beginning and 153.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-10 03:15:17,920 INFO L158 Benchmark]: Boogie Preprocessor took 13.96ms. Allocated memory is still 195.0MB. Free memory was 153.7MB in the beginning and 152.7MB in the end (delta: 994.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:15:17,920 INFO L158 Benchmark]: RCFGBuilder took 235.61ms. Allocated memory is still 195.0MB. Free memory was 152.6MB in the beginning and 140.4MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-10 03:15:17,920 INFO L158 Benchmark]: TraceAbstraction took 756705.95ms. Allocated memory was 195.0MB in the beginning and 620.8MB in the end (delta: 425.7MB). Free memory was 139.9MB in the beginning and 467.3MB in the end (delta: -327.4MB). Peak memory consumption was 99.1MB. Max. memory is 8.0GB. [2022-02-10 03:15:17,921 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14ms. Allocated memory is still 195.0MB. Free memory was 156.5MB in the beginning and 156.5MB in the end (delta: 56.4kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.48ms. Allocated memory is still 195.0MB. Free memory was 155.2MB in the beginning and 153.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.96ms. Allocated memory is still 195.0MB. Free memory was 153.7MB in the beginning and 152.7MB in the end (delta: 994.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 235.61ms. Allocated memory is still 195.0MB. Free memory was 152.6MB in the beginning and 140.4MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 756705.95ms. Allocated memory was 195.0MB in the beginning and 620.8MB in the end (delta: 425.7MB). Free memory was 139.9MB in the beginning and 467.3MB in the end (delta: -327.4MB). Peak memory consumption was 99.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 756.6s, OverallIterations: 510, TraceHistogramMax: 5, PathProgramHistogramMax: 502, EmptinessCheckTime: 0.8s, AutomataDifference: 164.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, PartialOrderReductionTime: 0.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29005 SdHoareTripleChecker+Valid, 88.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29005 mSDsluCounter, 72096 SdHoareTripleChecker+Invalid, 73.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 41656 IncrementalHoareTripleChecker+Unchecked, 133344 mSDsCounter, 7079 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 214764 IncrementalHoareTripleChecker+Invalid, 263499 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7079 mSolverCounterUnsat, 6079 mSDtfsCounter, 214764 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31717 GetRequests, 17785 SyntacticMatches, 1761 SemanticMatches, 12171 ConstructedPredicates, 0 IntricatePredicates, 17 DeprecatedPredicates, 75303 ImplicationChecksByTransitivity, 231.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12173occurred in iteration=0, InterpolantAutomatonStates: 7119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 509 MinimizatonAttempts, 44855 StatesRemovedByMinimization, 509 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3s SsaConstructionTime, 7.0s SatisfiabilityAnalysisTime, 463.7s InterpolantComputationTime, 25237 NumberOfCodeBlocks, 25170 NumberOfCodeBlocksAsserted, 1904 NumberOfCheckSat, 36279 ConstructedInterpolants, 2065 QuantifiedInterpolants, 532576 SizeOfPredicates, 5391 NumberOfNonLiveVariables, 57798 ConjunctsInSsa, 11106 ConjunctsInUnsatCore, 1513 InterpolantComputations, 8 PerfectInterpolantSequences, 13775/28613 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown