/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-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:32:13,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:32:13,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:32:13,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-01 18:32:13,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-01 18:32:13,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-01 18:32:13,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-01 18:32:13,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-01 18:32:13,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-01 18:32:13,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-01 18:32:13,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-01 18:32:13,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-01 18:32:13,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-01 18:32:13,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-01 18:32:13,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-01 18:32:13,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-01 18:32:13,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-01 18:32:13,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-01 18:32:13,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-01 18:32:13,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-01 18:32:13,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-01 18:32:13,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-01 18:32:13,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-01 18:32:13,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-01 18:32:13,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-01 18:32:13,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-01 18:32:13,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-01 18:32:13,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-01 18:32:13,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-01 18:32:13,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-01 18:32:13,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-01 18:32:13,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-01 18:32:13,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-01 18:32:13,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-01 18:32:13,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-01 18:32:13,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-01 18:32:13,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-01 18:32:13,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-01 18:32:13,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 18:32:13,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 18:32:13,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 18:32:13,716 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-FA-NoLbe.epf [2022-03-01 18:32:13,739 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:32:13,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:32:13,739 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:32:13,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:32:13,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:32:13,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:32:13,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:32:13,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:32:13,742 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:32:13,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:32:13,743 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:32:13,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:32:13,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:32:13,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:32:13,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:32:13,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:32:13,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:32:13,744 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:32:13,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:32:13,744 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:32:13,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:32:13,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:32:13,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:32:13,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:32:13,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:32:13,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:32:13,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:32:13,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:32:13,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:32:13,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:32:13,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:32:13,745 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:32:13,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:32:13,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:32:13,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:32:13,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:32:13,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:32:13,940 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:32:13,942 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:32:13,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl [2022-03-01 18:32:13,943 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl' [2022-03-01 18:32:13,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:32:13,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:32:13,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:32:13,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:32:13,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:32:13,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:13,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:13,983 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:32:13,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:32:13,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:32:13,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:32:13,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:32:13,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:13,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:13,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:13,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:13,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:13,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:13,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:13,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:32:13,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:32:13,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:32:13,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:32:13,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/1) ... [2022-03-01 18:32:14,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:32:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:14,022 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) [2022-03-01 18:32:14,059 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 [2022-03-01 18:32:14,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:32:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:32:14,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:32:14,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:32:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:32:14,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:32:14,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:32:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:32:14,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:32:14,073 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:32:14,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:32:14,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:32:14,074 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:32:14,113 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:32:14,114 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:32:14,189 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:32:14,199 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:32:14,199 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:32:14,201 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:32:14 BoogieIcfgContainer [2022-03-01 18:32:14,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:32:14,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:32:14,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:32:14,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:32:14,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:32:13" (1/2) ... [2022-03-01 18:32:14,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74909bf2 and model type min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:32:14, skipping insertion in model container [2022-03-01 18:32:14,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:32:14" (2/2) ... [2022-03-01 18:32:14,223 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun.wvr.bpl [2022-03-01 18:32:14,226 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:32:14,226 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:32:14,226 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:32:14,226 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:32:14,277 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 18:32:14,314 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:32:14,319 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 18:32:14,319 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 18:32:14,325 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-01 18:32:14,355 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:32:14,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:14,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:14,363 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash 541406590, now seen corresponding path program 1 times [2022-03-01 18:32:14,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:14,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959785137] [2022-03-01 18:32:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:14,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:14,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959785137] [2022-03-01 18:32:14,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959785137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:32:14,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:32:14,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:32:14,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031434189] [2022-03-01 18:32:14,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:32:14,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:32:14,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:14,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:32:14,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:32:14,536 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-03-01 18:32:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:14,591 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-03-01 18:32:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:32:14,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2022-03-01 18:32:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:14,605 INFO L225 Difference]: With dead ends: 217 [2022-03-01 18:32:14,605 INFO L226 Difference]: Without dead ends: 202 [2022-03-01 18:32:14,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:32:14,609 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:14,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:32:14,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-01 18:32:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-03-01 18:32:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-03-01 18:32:14,670 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-03-01 18:32:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:14,671 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-03-01 18:32:14,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-03-01 18:32:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-03-01 18:32:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:32:14,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:14,672 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] [2022-03-01 18:32:14,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:32:14,673 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:14,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1033477442, now seen corresponding path program 1 times [2022-03-01 18:32:14,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:14,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752872693] [2022-03-01 18:32:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:14,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:14,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:14,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752872693] [2022-03-01 18:32:14,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752872693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:32:14,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:32:14,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:32:14,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853834030] [2022-03-01 18:32:14,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:32:14,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 18:32:14,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 18:32:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 18:32:14,744 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:14,802 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-03-01 18:32:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 18:32:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:32:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:14,806 INFO L225 Difference]: With dead ends: 158 [2022-03-01 18:32:14,806 INFO L226 Difference]: Without dead ends: 158 [2022-03-01 18:32:14,807 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 [2022-03-01 18:32:14,808 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:14,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:32:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-01 18:32:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-03-01 18:32:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-01 18:32:14,821 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-03-01 18:32:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:14,822 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-01 18:32:14,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-01 18:32:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 18:32:14,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:14,824 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] [2022-03-01 18:32:14,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 18:32:14,824 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash -324870244, now seen corresponding path program 1 times [2022-03-01 18:32:14,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:14,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043483026] [2022-03-01 18:32:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:14,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:14,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:14,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043483026] [2022-03-01 18:32:14,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043483026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:32:14,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:32:14,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 18:32:14,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439710049] [2022-03-01 18:32:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:32:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:32:14,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:32:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:32:14,870 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:14,914 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-03-01 18:32:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:32:14,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:32:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:14,917 INFO L225 Difference]: With dead ends: 183 [2022-03-01 18:32:14,917 INFO L226 Difference]: Without dead ends: 183 [2022-03-01 18:32:14,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:32:14,918 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:14,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:32:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-01 18:32:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-03-01 18:32:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-01 18:32:14,928 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-01 18:32:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:14,928 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-01 18:32:14,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-01 18:32:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:32:14,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:14,930 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, 1, 1] [2022-03-01 18:32:14,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 18:32:14,930 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:14,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1959936804, now seen corresponding path program 1 times [2022-03-01 18:32:14,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:14,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793663002] [2022-03-01 18:32:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:14,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:15,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:15,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793663002] [2022-03-01 18:32:15,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793663002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:15,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197662948] [2022-03-01 18:32:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:15,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:15,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:15,286 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) [2022-03-01 18:32:15,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:32:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:15,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:32:15,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:15,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-03-01 18:32:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:15,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:16,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:32:16,163 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2022-03-01 18:32:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:16,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197662948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:16,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:16,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:32:16,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717893877] [2022-03-01 18:32:16,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:16,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:32:16,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:32:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:32:16,572 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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) [2022-03-01 18:32:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:16,856 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-01 18:32:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:32:16,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 22 [2022-03-01 18:32:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:16,858 INFO L225 Difference]: With dead ends: 366 [2022-03-01 18:32:16,859 INFO L226 Difference]: Without dead ends: 351 [2022-03-01 18:32:16,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:32:16,860 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:16,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 55 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:32:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-01 18:32:16,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-01 18:32:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-01 18:32:16,872 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-01 18:32:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:16,875 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-01 18:32:16,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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) [2022-03-01 18:32:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-01 18:32:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:32:16,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:16,877 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, 1, 1] [2022-03-01 18:32:16,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-01 18:32:17,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:17,087 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:17,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2127745896, now seen corresponding path program 2 times [2022-03-01 18:32:17,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:17,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372601651] [2022-03-01 18:32:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:17,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:17,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:17,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372601651] [2022-03-01 18:32:17,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372601651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:17,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792033550] [2022-03-01 18:32:17,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:32:17,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:17,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:17,294 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) [2022-03-01 18:32:17,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:32:17,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:32:17,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:17,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:32:17,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:17,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:32:17,597 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 45 treesize of output 41 [2022-03-01 18:32:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:17,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:18,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:32:18,101 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 75 treesize of output 67 [2022-03-01 18:32:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:18,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792033550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:18,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:18,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-03-01 18:32:18,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623583470] [2022-03-01 18:32:18,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:18,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:32:18,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:32:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:32:18,363 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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) [2022-03-01 18:32:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:19,176 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-03-01 18:32:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:32:19,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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 22 [2022-03-01 18:32:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:19,181 INFO L225 Difference]: With dead ends: 478 [2022-03-01 18:32:19,181 INFO L226 Difference]: Without dead ends: 463 [2022-03-01 18:32:19,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:32:19,182 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 286 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:19,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 125 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:19,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-01 18:32:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-03-01 18:32:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-01 18:32:19,190 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-01 18:32:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:19,191 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-01 18:32:19,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 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) [2022-03-01 18:32:19,191 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-01 18:32:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:32:19,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:19,192 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, 1, 1] [2022-03-01 18:32:19,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:19,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:19,414 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:19,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1828972448, now seen corresponding path program 3 times [2022-03-01 18:32:19,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:19,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519448512] [2022-03-01 18:32:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:19,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:19,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:19,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519448512] [2022-03-01 18:32:19,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519448512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:19,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591968058] [2022-03-01 18:32:19,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:32:19,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:19,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:19,587 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) [2022-03-01 18:32:19,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:32:19,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:32:19,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:32:19,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:19,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 33 [2022-03-01 18:32:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:19,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:20,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:32:20,027 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-03-01 18:32:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:20,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591968058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:20,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:20,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-01 18:32:20,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608476394] [2022-03-01 18:32:20,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:20,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:32:20,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:32:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:32:20,344 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2022-03-01 18:32:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:20,794 INFO L93 Difference]: Finished difference Result 433 states and 1240 transitions. [2022-03-01 18:32:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 18:32:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 22 [2022-03-01 18:32:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:20,797 INFO L225 Difference]: With dead ends: 433 [2022-03-01 18:32:20,797 INFO L226 Difference]: Without dead ends: 418 [2022-03-01 18:32:20,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:32:20,798 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:20,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 132 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-03-01 18:32:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 241. [2022-03-01 18:32:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-01 18:32:20,806 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-01 18:32:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:20,807 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-01 18:32:20,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2022-03-01 18:32:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-01 18:32:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:32:20,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:20,808 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, 1, 1] [2022-03-01 18:32:20,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:21,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:21,020 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash -258146848, now seen corresponding path program 4 times [2022-03-01 18:32:21,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:21,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042536280] [2022-03-01 18:32:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:21,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:21,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:21,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042536280] [2022-03-01 18:32:21,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042536280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:21,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6612623] [2022-03-01 18:32:21,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:32:21,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:21,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:21,209 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) [2022-03-01 18:32:21,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:32:21,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:32:21,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:21,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 18:32:21,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:21,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:32:21,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 41 [2022-03-01 18:32:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:21,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:21,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:32:21,829 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 73 treesize of output 67 [2022-03-01 18:32:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:22,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6612623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:22,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:22,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:32:22,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129616093] [2022-03-01 18:32:22,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:22,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:32:22,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:32:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:32:22,085 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2022-03-01 18:32:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:22,383 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-03-01 18:32:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:32:22,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 22 [2022-03-01 18:32:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:22,385 INFO L225 Difference]: With dead ends: 374 [2022-03-01 18:32:22,385 INFO L226 Difference]: Without dead ends: 359 [2022-03-01 18:32:22,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:32:22,386 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:22,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 118 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 278 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-01 18:32:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-01 18:32:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-03-01 18:32:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9262295081967213) internal successors, (714), 244 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-03-01 18:32:22,392 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-03-01 18:32:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:22,392 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-03-01 18:32:22,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2022-03-01 18:32:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-03-01 18:32:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:32:22,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:22,393 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, 1, 1] [2022-03-01 18:32:22,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-01 18:32:22,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:22,610 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:22,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1789401154, now seen corresponding path program 5 times [2022-03-01 18:32:22,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:22,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038486836] [2022-03-01 18:32:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:22,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:22,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:22,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038486836] [2022-03-01 18:32:22,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038486836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:22,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131513715] [2022-03-01 18:32:22,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:32:22,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:22,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:22,763 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) [2022-03-01 18:32:22,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:32:22,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:32:22,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:22,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:32:22,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:22,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:32:22,944 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 45 treesize of output 41 [2022-03-01 18:32:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:23,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:23,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:32:23,299 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 73 treesize of output 67 [2022-03-01 18:32:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:23,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131513715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:23,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:23,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-01 18:32:23,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149367023] [2022-03-01 18:32:23,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:23,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:32:23,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:23,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:32:23,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:32:23,562 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-03-01 18:32:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:24,498 INFO L93 Difference]: Finished difference Result 659 states and 1889 transitions. [2022-03-01 18:32:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:32:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 22 [2022-03-01 18:32:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:24,501 INFO L225 Difference]: With dead ends: 659 [2022-03-01 18:32:24,502 INFO L226 Difference]: Without dead ends: 644 [2022-03-01 18:32:24,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:32:24,502 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 161 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:24,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 231 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-01 18:32:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 247. [2022-03-01 18:32:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-03-01 18:32:24,510 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-03-01 18:32:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:24,510 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-03-01 18:32:24,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2022-03-01 18:32:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-03-01 18:32:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 18:32:24,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:24,511 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, 1, 1] [2022-03-01 18:32:24,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:24,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:24,727 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1248888004, now seen corresponding path program 6 times [2022-03-01 18:32:24,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:24,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688097751] [2022-03-01 18:32:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:24,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:24,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688097751] [2022-03-01 18:32:24,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688097751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:24,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344847598] [2022-03-01 18:32:24,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:32:24,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:24,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:24,915 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) [2022-03-01 18:32:24,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:32:24,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:32:24,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:24,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 18:32:24,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:25,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:32:25,161 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 45 treesize of output 33 [2022-03-01 18:32:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:25,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:25,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:32:25,435 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 73 treesize of output 67 [2022-03-01 18:32:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:25,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344847598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:25,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:25,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-03-01 18:32:25,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144799182] [2022-03-01 18:32:25,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:25,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:32:25,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:32:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:32:25,744 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2022-03-01 18:32:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:26,636 INFO L93 Difference]: Finished difference Result 489 states and 1408 transitions. [2022-03-01 18:32:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:32:26,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 22 [2022-03-01 18:32:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:26,638 INFO L225 Difference]: With dead ends: 489 [2022-03-01 18:32:26,638 INFO L226 Difference]: Without dead ends: 474 [2022-03-01 18:32:26,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:32:26,639 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 136 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:26,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 224 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 605 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-03-01 18:32:26,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-01 18:32:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 247. [2022-03-01 18:32:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-03-01 18:32:26,647 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-03-01 18:32:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:26,647 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-03-01 18:32:26,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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) [2022-03-01 18:32:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-03-01 18:32:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:26,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:26,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:26,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:26,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:26,868 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash 976010682, now seen corresponding path program 7 times [2022-03-01 18:32:26,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:26,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167111360] [2022-03-01 18:32:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:26,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:26,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:26,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167111360] [2022-03-01 18:32:26,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167111360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:26,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021935184] [2022-03-01 18:32:26,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:32:26,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:26,916 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) [2022-03-01 18:32:26,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:32:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:26,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:27,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:27,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021935184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:27,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:27,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:32:27,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104355860] [2022-03-01 18:32:27,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:27,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:32:27,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:32:27,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:32:27,115 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-03-01 18:32:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:27,868 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-03-01 18:32:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:32:27,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 [2022-03-01 18:32:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:27,873 INFO L225 Difference]: With dead ends: 1099 [2022-03-01 18:32:27,873 INFO L226 Difference]: Without dead ends: 1099 [2022-03-01 18:32:27,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:32:27,874 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 277 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:27,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 202 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-03-01 18:32:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-03-01 18:32:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-03-01 18:32:27,886 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-03-01 18:32:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:27,887 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-03-01 18:32:27,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2022-03-01 18:32:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-03-01 18:32:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:27,888 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:27,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:27,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:28,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:28,103 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash -308162, now seen corresponding path program 8 times [2022-03-01 18:32:28,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:28,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938327894] [2022-03-01 18:32:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:28,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:28,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:28,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938327894] [2022-03-01 18:32:28,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938327894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:28,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939054291] [2022-03-01 18:32:28,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:32:28,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:28,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:28,153 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) [2022-03-01 18:32:28,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:32:28,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:32:28,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:28,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:28,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939054291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:28,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:28,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:32:28,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361048663] [2022-03-01 18:32:28,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:28,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:32:28,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:28,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:32:28,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:32:28,393 INFO L87 Difference]: Start difference. First operand 311 states and 974 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-01 18:32:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:30,150 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-03-01 18:32:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 18:32:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 [2022-03-01 18:32:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:30,157 INFO L225 Difference]: With dead ends: 1794 [2022-03-01 18:32:30,157 INFO L226 Difference]: Without dead ends: 1794 [2022-03-01 18:32:30,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:32:30,160 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 460 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:30,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 303 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:32:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-03-01 18:32:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-03-01 18:32:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-01 18:32:30,175 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-01 18:32:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:30,175 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-01 18:32:30,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-01 18:32:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-01 18:32:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:30,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:30,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:30,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:30,387 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,SelfDestructingSolverStorable10 [2022-03-01 18:32:30,388 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:30,388 INFO L85 PathProgramCache]: Analyzing trace with hash 566643918, now seen corresponding path program 9 times [2022-03-01 18:32:30,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:30,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395549193] [2022-03-01 18:32:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:30,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:30,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:30,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395549193] [2022-03-01 18:32:30,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395549193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:30,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676280460] [2022-03-01 18:32:30,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:32:30,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:30,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:30,427 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) [2022-03-01 18:32:30,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:32:30,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:32:30,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:30,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:30,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:30,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:30,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676280460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:30,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:30,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:32:30,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323005569] [2022-03-01 18:32:30,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:30,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:32:30,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:30,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:32:30,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:32:30,662 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-01 18:32:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:31,475 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-01 18:32:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 18:32:31,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 [2022-03-01 18:32:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:31,509 INFO L225 Difference]: With dead ends: 1470 [2022-03-01 18:32:31,509 INFO L226 Difference]: Without dead ends: 1470 [2022-03-01 18:32:31,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:32:31,511 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 338 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:31,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 252 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-01 18:32:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-01 18:32:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-01 18:32:31,522 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-01 18:32:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:31,522 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-01 18:32:31,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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) [2022-03-01 18:32:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-01 18:32:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:31,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:31,524 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, 1, 1, 1, 1] [2022-03-01 18:32:31,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:31,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:31,740 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1502782590, now seen corresponding path program 1 times [2022-03-01 18:32:31,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:31,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067149860] [2022-03-01 18:32:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:31,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:31,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:31,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067149860] [2022-03-01 18:32:31,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067149860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:31,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017358068] [2022-03-01 18:32:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:31,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:31,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:31,766 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) [2022-03-01 18:32:31,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:32:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:31,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:32:31,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:31,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:31,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017358068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:31,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:31,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:32:31,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193177328] [2022-03-01 18:32:31,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:31,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:32:31,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:32:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:32:31,927 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-01 18:32:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:32,055 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-01 18:32:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 18:32:32,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-03-01 18:32:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:32,058 INFO L225 Difference]: With dead ends: 685 [2022-03-01 18:32:32,058 INFO L226 Difference]: Without dead ends: 679 [2022-03-01 18:32:32,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:32:32,059 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:32,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 42 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:32:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-01 18:32:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-01 18:32:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 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) [2022-03-01 18:32:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-01 18:32:32,068 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-01 18:32:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:32,068 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-01 18:32:32,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-01 18:32:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-01 18:32:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:32,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:32,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:32,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-01 18:32:32,285 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,SelfDestructingSolverStorable12 [2022-03-01 18:32:32,286 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1065813882, now seen corresponding path program 10 times [2022-03-01 18:32:32,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:32,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44915137] [2022-03-01 18:32:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:32,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:32,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44915137] [2022-03-01 18:32:32,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44915137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:32,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498394544] [2022-03-01 18:32:32,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:32:32,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:32,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:32,326 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) [2022-03-01 18:32:32,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:32:32,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:32:32,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:32,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:32,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498394544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:32,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:32,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:32:32,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453207670] [2022-03-01 18:32:32,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:32,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:32:32,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:32,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:32:32,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:32:32,477 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-03-01 18:32:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:32,776 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-01 18:32:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:32:32,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 [2022-03-01 18:32:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:32,781 INFO L225 Difference]: With dead ends: 1159 [2022-03-01 18:32:32,781 INFO L226 Difference]: Without dead ends: 1111 [2022-03-01 18:32:32,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:32:32,782 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 276 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:32,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 103 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:32:32,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-01 18:32:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-01 18:32:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-01 18:32:32,800 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-01 18:32:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:32,800 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-01 18:32:32,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-03-01 18:32:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-01 18:32:32,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:32,802 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:32,802 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, 1, 1, 1, 1] [2022-03-01 18:32:32,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:33,015 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,SelfDestructingSolverStorable13 [2022-03-01 18:32:33,015 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:33,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:33,016 INFO L85 PathProgramCache]: Analyzing trace with hash 359856550, now seen corresponding path program 2 times [2022-03-01 18:32:33,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:33,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318253976] [2022-03-01 18:32:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:33,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:33,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:33,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318253976] [2022-03-01 18:32:33,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318253976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:33,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372754732] [2022-03-01 18:32:33,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:32:33,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:33,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:33,042 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) [2022-03-01 18:32:33,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:32:33,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:32:33,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:33,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:32:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:33,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:33,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372754732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:33,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:33,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 18:32:33,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666642903] [2022-03-01 18:32:33,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:33,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:32:33,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:32:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:32:33,195 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-01 18:32:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:33,400 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-01 18:32:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:32:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-03-01 18:32:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:33,405 INFO L225 Difference]: With dead ends: 1267 [2022-03-01 18:32:33,406 INFO L226 Difference]: Without dead ends: 1267 [2022-03-01 18:32:33,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:32:33,408 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:33,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 78 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:32:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-01 18:32:33,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-01 18:32:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-01 18:32:33,425 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-01 18:32:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:33,425 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-01 18:32:33,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-03-01 18:32:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-01 18:32:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:33,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:33,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:33,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:33,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 18:32:33,643 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash -986825016, now seen corresponding path program 11 times [2022-03-01 18:32:33,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:33,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832840863] [2022-03-01 18:32:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:33,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:33,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832840863] [2022-03-01 18:32:33,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832840863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:33,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875982079] [2022-03-01 18:32:33,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:32:33,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:33,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:33,687 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) [2022-03-01 18:32:33,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:32:33,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:32:33,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:33,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:33,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:33,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875982079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:33,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:33,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:32:33,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063523513] [2022-03-01 18:32:33,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:33,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:32:33,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:33,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:32:33,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:32:33,837 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:32:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:34,313 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-01 18:32:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:32:34,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-03-01 18:32:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:34,322 INFO L225 Difference]: With dead ends: 2268 [2022-03-01 18:32:34,323 INFO L226 Difference]: Without dead ends: 2268 [2022-03-01 18:32:34,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:32:34,323 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 259 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:34,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 150 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-01 18:32:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-01 18:32:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-01 18:32:34,349 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-01 18:32:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:34,349 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-01 18:32:34,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:32:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-01 18:32:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:34,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:34,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:34,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:34,582 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,SelfDestructingSolverStorable15 [2022-03-01 18:32:34,582 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash -201910922, now seen corresponding path program 12 times [2022-03-01 18:32:34,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:34,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087602444] [2022-03-01 18:32:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:34,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:34,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:34,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087602444] [2022-03-01 18:32:34,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087602444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:34,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401547324] [2022-03-01 18:32:34,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:32:34,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:34,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:34,630 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) [2022-03-01 18:32:34,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:32:34,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:32:34,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:34,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:34,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:34,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401547324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:34,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:34,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:32:34,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507229153] [2022-03-01 18:32:34,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:34,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:32:34,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:34,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:32:34,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:32:34,776 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:32:35,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:35,326 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-01 18:32:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:32:35,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-03-01 18:32:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:35,334 INFO L225 Difference]: With dead ends: 2256 [2022-03-01 18:32:35,334 INFO L226 Difference]: Without dead ends: 2256 [2022-03-01 18:32:35,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:32:35,335 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 300 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:35,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 141 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-01 18:32:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-01 18:32:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-01 18:32:35,359 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-01 18:32:35,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:35,359 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-01 18:32:35,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:32:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-01 18:32:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:35,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:35,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:35,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:35,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:35,580 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:35,580 INFO L85 PathProgramCache]: Analyzing trace with hash 186144540, now seen corresponding path program 13 times [2022-03-01 18:32:35,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:35,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975914912] [2022-03-01 18:32:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:35,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:35,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:35,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975914912] [2022-03-01 18:32:35,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975914912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:35,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176191098] [2022-03-01 18:32:35,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:32:35,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:35,624 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) [2022-03-01 18:32:35,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:32:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:35,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:35,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:35,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:35,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176191098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:35,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:35,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-01 18:32:35,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510057837] [2022-03-01 18:32:35,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:35,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:32:35,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:35,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:32:35,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:32:35,760 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2022-03-01 18:32:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:36,018 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-01 18:32:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:32:36,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 24 [2022-03-01 18:32:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:36,027 INFO L225 Difference]: With dead ends: 1611 [2022-03-01 18:32:36,027 INFO L226 Difference]: Without dead ends: 1611 [2022-03-01 18:32:36,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:32:36,028 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 258 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:36,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 104 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:32:36,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-01 18:32:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-01 18:32:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-01 18:32:36,051 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-01 18:32:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:36,052 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-01 18:32:36,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2022-03-01 18:32:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-01 18:32:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:36,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:36,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:36,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:36,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 18:32:36,270 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:36,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:36,270 INFO L85 PathProgramCache]: Analyzing trace with hash -246732064, now seen corresponding path program 14 times [2022-03-01 18:32:36,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:36,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518369984] [2022-03-01 18:32:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:36,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:36,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:36,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518369984] [2022-03-01 18:32:36,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518369984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:36,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77192631] [2022-03-01 18:32:36,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:32:36,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:36,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:36,308 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) [2022-03-01 18:32:36,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:32:36,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:32:36,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:36,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:36,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:36,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:36,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77192631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:36,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:36,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:32:36,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001957285] [2022-03-01 18:32:36,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:36,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:32:36,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:32:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:32:36,455 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:32:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:36,937 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-01 18:32:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:32:36,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-03-01 18:32:36,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:36,943 INFO L225 Difference]: With dead ends: 2408 [2022-03-01 18:32:36,944 INFO L226 Difference]: Without dead ends: 2404 [2022-03-01 18:32:36,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:32:36,944 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 271 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:36,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 151 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:36,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-01 18:32:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-01 18:32:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-01 18:32:36,973 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-01 18:32:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:36,973 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-01 18:32:36,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-03-01 18:32:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-01 18:32:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:36,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:36,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:37,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:37,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:37,206 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:37,207 INFO L85 PathProgramCache]: Analyzing trace with hash -112101728, now seen corresponding path program 15 times [2022-03-01 18:32:37,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:37,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645263052] [2022-03-01 18:32:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:37,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:37,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:37,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645263052] [2022-03-01 18:32:37,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645263052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:37,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818137625] [2022-03-01 18:32:37,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:32:37,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:37,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:37,246 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) [2022-03-01 18:32:37,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:32:37,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:32:37,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:37,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:37,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:37,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:37,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818137625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:37,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:37,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:32:37,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428447308] [2022-03-01 18:32:37,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:37,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:32:37,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:32:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:32:37,438 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:32:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:38,316 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-01 18:32:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 18:32:38,317 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 [2022-03-01 18:32:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:38,326 INFO L225 Difference]: With dead ends: 3509 [2022-03-01 18:32:38,326 INFO L226 Difference]: Without dead ends: 3509 [2022-03-01 18:32:38,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 18:32:38,327 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 408 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:38,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 270 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:32:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-01 18:32:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-01 18:32:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-01 18:32:38,365 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-01 18:32:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:38,365 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-01 18:32:38,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:32:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-01 18:32:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:38,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:38,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:38,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:38,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:38,584 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:38,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1530937426, now seen corresponding path program 16 times [2022-03-01 18:32:38,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:38,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417967959] [2022-03-01 18:32:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:38,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:38,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:38,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417967959] [2022-03-01 18:32:38,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417967959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:38,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030285861] [2022-03-01 18:32:38,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:32:38,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:38,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:38,625 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) [2022-03-01 18:32:38,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:32:38,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:32:38,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:38,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:38,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:38,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:38,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030285861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:38,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:38,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:32:38,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880817445] [2022-03-01 18:32:38,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:38,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:32:38,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:32:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:32:38,796 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:32:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:39,958 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-01 18:32:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 18:32:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 [2022-03-01 18:32:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:39,967 INFO L225 Difference]: With dead ends: 3211 [2022-03-01 18:32:39,967 INFO L226 Difference]: Without dead ends: 3207 [2022-03-01 18:32:39,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 18:32:39,969 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 473 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:39,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 262 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:32:39,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-01 18:32:39,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-01 18:32:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-01 18:32:40,004 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-01 18:32:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:40,004 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-01 18:32:40,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:32:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-01 18:32:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:40,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:40,007 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, 1, 1, 1, 1] [2022-03-01 18:32:40,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:40,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:40,223 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:40,223 INFO L85 PathProgramCache]: Analyzing trace with hash 618651874, now seen corresponding path program 3 times [2022-03-01 18:32:40,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:40,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486005742] [2022-03-01 18:32:40,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:40,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:40,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:40,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486005742] [2022-03-01 18:32:40,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486005742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:40,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404036715] [2022-03-01 18:32:40,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:32:40,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:40,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:40,258 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) [2022-03-01 18:32:40,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:32:40,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:32:40,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:32:40,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:40,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:40,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404036715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:40,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:40,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-01 18:32:40,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155808136] [2022-03-01 18:32:40,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:40,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:32:40,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:40,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:32:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:32:40,396 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-03-01 18:32:40,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:40,516 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-01 18:32:40,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:32:40,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 24 [2022-03-01 18:32:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:40,519 INFO L225 Difference]: With dead ends: 1333 [2022-03-01 18:32:40,519 INFO L226 Difference]: Without dead ends: 1333 [2022-03-01 18:32:40,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:32:40,519 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:40,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 66 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:32:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-01 18:32:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-01 18:32:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-01 18:32:40,536 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-01 18:32:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:40,536 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-01 18:32:40,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-03-01 18:32:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-01 18:32:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:40,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:40,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:40,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:40,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:40,751 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:40,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:40,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1548851618, now seen corresponding path program 17 times [2022-03-01 18:32:40,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:40,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067149826] [2022-03-01 18:32:40,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:40,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:40,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:40,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067149826] [2022-03-01 18:32:40,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067149826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:40,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098622531] [2022-03-01 18:32:40,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:32:40,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:40,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:40,795 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) [2022-03-01 18:32:40,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:32:40,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:32:40,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:40,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:40,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098622531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:40,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:40,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:32:40,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114584845] [2022-03-01 18:32:40,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:40,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:32:40,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:40,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:32:40,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:32:40,938 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-01 18:32:41,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:41,267 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-01 18:32:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:32:41,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-03-01 18:32:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:41,272 INFO L225 Difference]: With dead ends: 2129 [2022-03-01 18:32:41,272 INFO L226 Difference]: Without dead ends: 2129 [2022-03-01 18:32:41,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:32:41,272 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 171 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:41,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 143 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-01 18:32:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-01 18:32:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-01 18:32:41,295 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-01 18:32:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:41,295 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-01 18:32:41,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-01 18:32:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-01 18:32:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:41,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:41,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:41,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:41,511 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,SelfDestructingSolverStorable22 [2022-03-01 18:32:41,511 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash -843436226, now seen corresponding path program 18 times [2022-03-01 18:32:41,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:41,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336527464] [2022-03-01 18:32:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:41,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:41,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:41,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336527464] [2022-03-01 18:32:41,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336527464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:41,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573310034] [2022-03-01 18:32:41,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:32:41,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:41,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:41,539 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) [2022-03-01 18:32:41,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:32:41,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:32:41,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:41,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:41,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:41,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:41,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573310034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:41,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:41,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 18:32:41,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982083610] [2022-03-01 18:32:41,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:41,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:32:41,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:41,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:32:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:32:41,678 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-01 18:32:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:42,011 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-01 18:32:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 18:32:42,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-03-01 18:32:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:42,016 INFO L225 Difference]: With dead ends: 2262 [2022-03-01 18:32:42,016 INFO L226 Difference]: Without dead ends: 2262 [2022-03-01 18:32:42,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:32:42,017 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:42,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 138 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-01 18:32:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-01 18:32:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-01 18:32:42,046 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-01 18:32:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:42,046 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-01 18:32:42,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-01 18:32:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-01 18:32:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:42,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:42,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:42,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:42,263 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,SelfDestructingSolverStorable23 [2022-03-01 18:32:42,263 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1926458882, now seen corresponding path program 19 times [2022-03-01 18:32:42,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:42,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216269611] [2022-03-01 18:32:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:42,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:42,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:42,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216269611] [2022-03-01 18:32:42,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216269611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:42,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844753757] [2022-03-01 18:32:42,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:32:42,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:42,298 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) [2022-03-01 18:32:42,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:32:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:42,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:42,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:42,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844753757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:42,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:42,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-01 18:32:42,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241471720] [2022-03-01 18:32:42,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:42,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:32:42,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:42,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:32:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:32:42,453 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-03-01 18:32:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:42,694 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-01 18:32:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:32:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 [2022-03-01 18:32:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:42,698 INFO L225 Difference]: With dead ends: 1474 [2022-03-01 18:32:42,698 INFO L226 Difference]: Without dead ends: 1464 [2022-03-01 18:32:42,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:32:42,698 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:42,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 133 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:32:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-01 18:32:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-01 18:32:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-01 18:32:42,716 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-01 18:32:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:42,716 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-01 18:32:42,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-03-01 18:32:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-01 18:32:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:42,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:42,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:42,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:42,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:42,934 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash -888257368, now seen corresponding path program 20 times [2022-03-01 18:32:42,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:42,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382808373] [2022-03-01 18:32:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:42,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:42,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:42,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382808373] [2022-03-01 18:32:42,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382808373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:42,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989484730] [2022-03-01 18:32:42,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:32:42,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:42,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:42,963 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) [2022-03-01 18:32:42,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:32:42,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:32:42,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:42,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:43,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:43,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989484730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:43,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:43,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 18:32:43,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98744544] [2022-03-01 18:32:43,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:43,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:32:43,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:32:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:32:43,082 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-01 18:32:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:43,345 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-01 18:32:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:32:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-03-01 18:32:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:43,350 INFO L225 Difference]: With dead ends: 2318 [2022-03-01 18:32:43,350 INFO L226 Difference]: Without dead ends: 2314 [2022-03-01 18:32:43,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:32:43,351 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 219 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:43,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 90 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:32:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-01 18:32:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-01 18:32:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-01 18:32:43,376 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-01 18:32:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:43,376 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-01 18:32:43,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-03-01 18:32:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-01 18:32:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:43,378 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:43,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:43,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:43,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:43,595 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:43,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:43,595 INFO L85 PathProgramCache]: Analyzing trace with hash -290920710, now seen corresponding path program 21 times [2022-03-01 18:32:43,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:43,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062891497] [2022-03-01 18:32:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:43,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:43,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:43,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062891497] [2022-03-01 18:32:43,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062891497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:43,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853821295] [2022-03-01 18:32:43,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:32:43,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:43,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:43,628 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) [2022-03-01 18:32:43,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:32:43,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:32:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:43,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:43,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:43,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853821295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:43,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:43,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:32:43,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962441959] [2022-03-01 18:32:43,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:43,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:32:43,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:43,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:32:43,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:32:43,753 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-01 18:32:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:44,039 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-01 18:32:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:32:44,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-03-01 18:32:44,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:44,043 INFO L225 Difference]: With dead ends: 2302 [2022-03-01 18:32:44,044 INFO L226 Difference]: Without dead ends: 2290 [2022-03-01 18:32:44,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:32:44,044 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:44,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 133 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-01 18:32:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-01 18:32:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-01 18:32:44,066 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-01 18:32:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:44,066 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-01 18:32:44,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-03-01 18:32:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-01 18:32:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:44,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:44,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:44,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:44,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 18:32:44,280 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:44,280 INFO L85 PathProgramCache]: Analyzing trace with hash -817340994, now seen corresponding path program 22 times [2022-03-01 18:32:44,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:44,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125514849] [2022-03-01 18:32:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:44,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:44,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:44,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125514849] [2022-03-01 18:32:44,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125514849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:44,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733670911] [2022-03-01 18:32:44,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:32:44,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:44,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:44,312 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) [2022-03-01 18:32:44,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:32:44,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:32:44,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:44,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:44,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:44,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733670911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:44,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:44,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:32:44,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318258710] [2022-03-01 18:32:44,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:44,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:32:44,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:44,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:32:44,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:32:44,497 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-01 18:32:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:45,345 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-01 18:32:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 18:32:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 [2022-03-01 18:32:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:45,355 INFO L225 Difference]: With dead ends: 4760 [2022-03-01 18:32:45,355 INFO L226 Difference]: Without dead ends: 4760 [2022-03-01 18:32:45,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:32:45,356 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 435 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:45,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 202 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-01 18:32:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-01 18:32:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-01 18:32:45,398 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-01 18:32:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:45,398 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-01 18:32:45,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-01 18:32:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-01 18:32:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:45,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:45,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:45,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:45,615 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,SelfDestructingSolverStorable27 [2022-03-01 18:32:45,615 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:45,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:45,615 INFO L85 PathProgramCache]: Analyzing trace with hash -250388914, now seen corresponding path program 23 times [2022-03-01 18:32:45,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:45,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951340981] [2022-03-01 18:32:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:45,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:45,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:45,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951340981] [2022-03-01 18:32:45,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951340981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:45,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595523891] [2022-03-01 18:32:45,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:32:45,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:45,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:45,657 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) [2022-03-01 18:32:45,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:32:45,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:32:45,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:45,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:45,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595523891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:45,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:45,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:32:45,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944533499] [2022-03-01 18:32:45,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:45,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:32:45,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:32:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:32:45,845 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-01 18:32:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:46,517 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-01 18:32:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:32:46,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 [2022-03-01 18:32:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:46,525 INFO L225 Difference]: With dead ends: 4260 [2022-03-01 18:32:46,526 INFO L226 Difference]: Without dead ends: 4260 [2022-03-01 18:32:46,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 18:32:46,527 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 350 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:46,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 198 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-01 18:32:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-01 18:32:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-01 18:32:46,565 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-01 18:32:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:46,565 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-01 18:32:46,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2022-03-01 18:32:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-01 18:32:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:46,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:46,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:46,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:46,783 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,SelfDestructingSolverStorable28 [2022-03-01 18:32:46,783 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:46,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:46,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1422734772, now seen corresponding path program 24 times [2022-03-01 18:32:46,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:46,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483776023] [2022-03-01 18:32:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:46,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:46,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:46,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483776023] [2022-03-01 18:32:46,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483776023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:46,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674333636] [2022-03-01 18:32:46,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:32:46,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:46,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:46,820 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) [2022-03-01 18:32:46,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:32:46,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:32:46,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:46,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:46,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674333636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:46,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:46,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-01 18:32:46,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962929232] [2022-03-01 18:32:46,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:46,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:32:46,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:32:46,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:32:46,972 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-01 18:32:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:47,599 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-01 18:32:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:32:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 [2022-03-01 18:32:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:47,607 INFO L225 Difference]: With dead ends: 4602 [2022-03-01 18:32:47,607 INFO L226 Difference]: Without dead ends: 4602 [2022-03-01 18:32:47,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:32:47,608 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 307 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:47,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 195 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-01 18:32:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-01 18:32:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-01 18:32:47,650 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-01 18:32:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:47,650 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-01 18:32:47,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-01 18:32:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-01 18:32:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:47,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:47,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:47,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:47,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:47,867 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1341358684, now seen corresponding path program 25 times [2022-03-01 18:32:47,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:47,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769120243] [2022-03-01 18:32:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:47,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:47,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:47,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769120243] [2022-03-01 18:32:47,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769120243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:47,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852109665] [2022-03-01 18:32:47,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:32:47,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:47,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:47,904 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) [2022-03-01 18:32:47,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:32:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:47,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:47,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:48,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852109665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:48,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:48,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-01 18:32:48,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66816743] [2022-03-01 18:32:48,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:48,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:32:48,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:48,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:32:48,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:32:48,051 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-01 18:32:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:48,611 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-01 18:32:48,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:32:48,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 [2022-03-01 18:32:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:48,618 INFO L225 Difference]: With dead ends: 4348 [2022-03-01 18:32:48,618 INFO L226 Difference]: Without dead ends: 4344 [2022-03-01 18:32:48,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 18:32:48,619 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:48,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 182 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-01 18:32:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-01 18:32:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-01 18:32:48,654 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-01 18:32:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:48,654 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-01 18:32:48,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-03-01 18:32:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-01 18:32:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:48,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:48,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:48,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:48,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:48,863 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:48,864 INFO L85 PathProgramCache]: Analyzing trace with hash -410701468, now seen corresponding path program 26 times [2022-03-01 18:32:48,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:48,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486636529] [2022-03-01 18:32:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:48,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:48,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:48,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486636529] [2022-03-01 18:32:48,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486636529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:48,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059416379] [2022-03-01 18:32:48,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:32:48,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:48,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:48,899 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) [2022-03-01 18:32:48,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:32:48,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:32:48,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:48,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:49,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059416379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:49,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:49,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:32:49,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671196243] [2022-03-01 18:32:49,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:49,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:32:49,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:49,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:32:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:32:49,076 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:32:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:49,653 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-01 18:32:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:32:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 [2022-03-01 18:32:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:49,661 INFO L225 Difference]: With dead ends: 4035 [2022-03-01 18:32:49,661 INFO L226 Difference]: Without dead ends: 4035 [2022-03-01 18:32:49,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:32:49,662 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 468 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:49,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 209 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-01 18:32:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-01 18:32:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-01 18:32:49,722 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-01 18:32:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:49,722 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-01 18:32:49,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:32:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-01 18:32:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:49,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:49,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:49,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 18:32:49,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:49,925 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:49,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1232337686, now seen corresponding path program 27 times [2022-03-01 18:32:49,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:49,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761042551] [2022-03-01 18:32:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:49,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:49,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:49,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761042551] [2022-03-01 18:32:49,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761042551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:49,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650078306] [2022-03-01 18:32:49,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:32:49,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:49,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:49,965 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) [2022-03-01 18:32:49,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:32:49,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:32:49,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:50,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:32:50,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650078306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:50,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:50,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:32:50,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287958013] [2022-03-01 18:32:50,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:50,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:32:50,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:32:50,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:32:50,133 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:32:50,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:50,850 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-01 18:32:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:32:50,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 [2022-03-01 18:32:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:50,858 INFO L225 Difference]: With dead ends: 3794 [2022-03-01 18:32:50,858 INFO L226 Difference]: Without dead ends: 3790 [2022-03-01 18:32:50,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 18:32:50,859 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 453 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:50,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 178 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-01 18:32:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-01 18:32:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-01 18:32:50,904 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-01 18:32:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:50,904 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-01 18:32:50,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2022-03-01 18:32:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-01 18:32:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:50,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:50,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:50,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-01 18:32:51,107 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,SelfDestructingSolverStorable32 [2022-03-01 18:32:51,107 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2059201626, now seen corresponding path program 28 times [2022-03-01 18:32:51,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:51,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544754183] [2022-03-01 18:32:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:51,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:51,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:51,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544754183] [2022-03-01 18:32:51,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544754183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:51,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576894056] [2022-03-01 18:32:51,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:32:51,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:51,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:51,153 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) [2022-03-01 18:32:51,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:32:51,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:32:51,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:51,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:51,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:51,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:51,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576894056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:51,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:51,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:32:51,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120491367] [2022-03-01 18:32:51,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:51,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:32:51,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:51,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:32:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:32:51,306 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:32:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:51,930 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-01 18:32:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:32:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-03-01 18:32:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:51,938 INFO L225 Difference]: With dead ends: 3978 [2022-03-01 18:32:51,938 INFO L226 Difference]: Without dead ends: 3978 [2022-03-01 18:32:51,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 18:32:51,939 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 272 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:51,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 165 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-01 18:32:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-01 18:32:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-01 18:32:51,986 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-01 18:32:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:51,986 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-01 18:32:51,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:32:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-01 18:32:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:51,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:51,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:52,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:52,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:52,205 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:52,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1977825538, now seen corresponding path program 29 times [2022-03-01 18:32:52,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:52,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784895280] [2022-03-01 18:32:52,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:52,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:52,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:52,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784895280] [2022-03-01 18:32:52,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784895280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:52,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406098560] [2022-03-01 18:32:52,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:32:52,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:52,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:52,240 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) [2022-03-01 18:32:52,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:32:52,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:32:52,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:52,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:52,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:52,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:52,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406098560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:52,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:52,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:32:52,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506283185] [2022-03-01 18:32:52,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:52,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:32:52,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:52,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:32:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:32:52,375 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:32:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:52,839 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-01 18:32:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:32:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-03-01 18:32:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:52,847 INFO L225 Difference]: With dead ends: 3706 [2022-03-01 18:32:52,847 INFO L226 Difference]: Without dead ends: 3702 [2022-03-01 18:32:52,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:32:52,847 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 265 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:52,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 150 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-01 18:32:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-01 18:32:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-01 18:32:52,886 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-01 18:32:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:52,886 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-01 18:32:52,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:32:52,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-01 18:32:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:52,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:52,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:52,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:53,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:53,103 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash 802049786, now seen corresponding path program 30 times [2022-03-01 18:32:53,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:53,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547603912] [2022-03-01 18:32:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:53,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:53,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547603912] [2022-03-01 18:32:53,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547603912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:53,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651662070] [2022-03-01 18:32:53,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:32:53,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:53,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:53,146 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) [2022-03-01 18:32:53,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:32:53,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:32:53,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:53,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:53,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:53,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651662070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:53,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:53,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:32:53,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478606125] [2022-03-01 18:32:53,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:53,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:32:53,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:32:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:32:53,285 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:32:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:53,801 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-01 18:32:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:32:53,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 24 [2022-03-01 18:32:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:53,809 INFO L225 Difference]: With dead ends: 4114 [2022-03-01 18:32:53,809 INFO L226 Difference]: Without dead ends: 4102 [2022-03-01 18:32:53,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 18:32:53,810 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 304 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:53,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 167 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-01 18:32:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-01 18:32:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-01 18:32:53,852 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-01 18:32:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:53,853 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-01 18:32:53,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 18:32:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-01 18:32:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:53,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:53,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:53,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-01 18:32:54,056 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,SelfDestructingSolverStorable35 [2022-03-01 18:32:54,056 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:54,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1895790794, now seen corresponding path program 31 times [2022-03-01 18:32:54,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:54,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477016126] [2022-03-01 18:32:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:54,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:54,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:54,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477016126] [2022-03-01 18:32:54,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477016126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:54,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137390056] [2022-03-01 18:32:54,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:32:54,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:54,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:54,109 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) [2022-03-01 18:32:54,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:32:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:54,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:54,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:54,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137390056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:54,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:54,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:32:54,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281031162] [2022-03-01 18:32:54,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:54,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:32:54,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:32:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:32:54,296 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-03-01 18:32:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:54,887 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-01 18:32:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 18:32:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 [2022-03-01 18:32:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:54,894 INFO L225 Difference]: With dead ends: 3694 [2022-03-01 18:32:54,895 INFO L226 Difference]: Without dead ends: 3694 [2022-03-01 18:32:54,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:32:54,895 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 344 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:54,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 268 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-01 18:32:54,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-01 18:32:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-01 18:32:54,933 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-01 18:32:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:54,933 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-01 18:32:54,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-03-01 18:32:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-01 18:32:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:54,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:54,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:54,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 18:32:55,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 18:32:55,146 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:55,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:55,147 INFO L85 PathProgramCache]: Analyzing trace with hash -252751640, now seen corresponding path program 32 times [2022-03-01 18:32:55,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:55,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956382293] [2022-03-01 18:32:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:55,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:55,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956382293] [2022-03-01 18:32:55,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956382293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:55,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170209464] [2022-03-01 18:32:55,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:32:55,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:55,181 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) [2022-03-01 18:32:55,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:32:55,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:32:55,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:55,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:55,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:55,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:55,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170209464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:55,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:55,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:32:55,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598404939] [2022-03-01 18:32:55,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:55,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:32:55,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:55,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:32:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:32:55,349 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-03-01 18:32:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:56,124 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-01 18:32:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:32:56,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 [2022-03-01 18:32:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:56,131 INFO L225 Difference]: With dead ends: 3420 [2022-03-01 18:32:56,131 INFO L226 Difference]: Without dead ends: 3416 [2022-03-01 18:32:56,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 18:32:56,132 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 343 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:56,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 234 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:32:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-01 18:32:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-01 18:32:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-01 18:32:56,171 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-01 18:32:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:56,171 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-01 18:32:56,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2022-03-01 18:32:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-01 18:32:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:32:56,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:56,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:56,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-01 18:32:56,375 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,SelfDestructingSolverStorable37 [2022-03-01 18:32:56,375 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1520208818, now seen corresponding path program 33 times [2022-03-01 18:32:56,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:56,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637833217] [2022-03-01 18:32:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:56,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:56,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637833217] [2022-03-01 18:32:56,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637833217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:56,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997035590] [2022-03-01 18:32:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:32:56,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:56,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:56,413 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) [2022-03-01 18:32:56,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:32:56,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:32:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:32:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:56,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:56,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997035590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:32:56,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:32:56,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:32:56,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688482101] [2022-03-01 18:32:56,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:32:56,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:32:56,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:32:56,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:32:56,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:32:56,576 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-03-01 18:32:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:32:57,151 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-01 18:32:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:32:57,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 [2022-03-01 18:32:57,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:32:57,158 INFO L225 Difference]: With dead ends: 3256 [2022-03-01 18:32:57,158 INFO L226 Difference]: Without dead ends: 3244 [2022-03-01 18:32:57,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:32:57,159 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 257 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:32:57,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 170 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:32:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-01 18:32:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-01 18:32:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:32:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-01 18:32:57,197 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-01 18:32:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:32:57,197 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-01 18:32:57,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-03-01 18:32:57,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-01 18:32:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:32:57,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:32:57,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:32:57,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 18:32:57,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:32:57,401 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:32:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:32:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1154803164, now seen corresponding path program 4 times [2022-03-01 18:32:57,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:32:57,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229361153] [2022-03-01 18:32:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:32:57,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:32:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:32:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:57,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:32:57,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229361153] [2022-03-01 18:32:57,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229361153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:32:57,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374991430] [2022-03-01 18:32:57,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:32:57,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:32:57,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:32:57,957 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) [2022-03-01 18:32:57,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:32:57,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:32:57,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:32:57,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:32:57,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:32:58,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:32:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:32:58,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:32:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:32:58,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:32:59,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:33:00,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:33:00,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-03-01 18:33:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:02,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374991430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:33:02,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:33:02,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:33:02,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172733549] [2022-03-01 18:33:02,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:33:02,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:33:02,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:33:02,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:33:02,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:33:02,664 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:09,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:33:09,614 INFO L93 Difference]: Finished difference Result 4116 states and 13116 transitions. [2022-03-01 18:33:09,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:33:09,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:33:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:33:09,621 INFO L225 Difference]: With dead ends: 4116 [2022-03-01 18:33:09,621 INFO L226 Difference]: Without dead ends: 4056 [2022-03-01 18:33:09,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=978, Invalid=4134, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:33:09,622 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 582 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:33:09,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 281 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:33:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4056 states. [2022-03-01 18:33:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4056 to 1792. [2022-03-01 18:33:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-03-01 18:33:09,663 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-03-01 18:33:09,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:33:09,663 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-03-01 18:33:09,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-03-01 18:33:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:33:09,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:33:09,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:33:09,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-01 18:33:09,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:33:09,883 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:33:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:33:09,883 INFO L85 PathProgramCache]: Analyzing trace with hash -873594852, now seen corresponding path program 5 times [2022-03-01 18:33:09,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:33:09,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294523937] [2022-03-01 18:33:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:33:09,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:33:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:33:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:10,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:33:10,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294523937] [2022-03-01 18:33:10,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294523937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:33:10,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722693975] [2022-03-01 18:33:10,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:33:10,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:33:10,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:33:10,566 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) [2022-03-01 18:33:10,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:33:10,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:33:10,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:33:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:33:10,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:33:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:33:11,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:33:11,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:33:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:11,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:33:12,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:33:12,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:33:12,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 335 treesize of output 261 [2022-03-01 18:33:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:15,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722693975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:33:15,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:33:15,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:33:15,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570885233] [2022-03-01 18:33:15,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:33:15,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:33:15,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:33:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:33:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:33:15,211 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:33:21,878 INFO L93 Difference]: Finished difference Result 4145 states and 13246 transitions. [2022-03-01 18:33:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:33:21,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:33:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:33:21,885 INFO L225 Difference]: With dead ends: 4145 [2022-03-01 18:33:21,885 INFO L226 Difference]: Without dead ends: 4115 [2022-03-01 18:33:21,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:33:21,886 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 493 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:33:21,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 373 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1394 Invalid, 0 Unknown, 85 Unchecked, 1.0s Time] [2022-03-01 18:33:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2022-03-01 18:33:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 1818. [2022-03-01 18:33:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.5833791964777104) internal successors, (6511), 1817 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6511 transitions. [2022-03-01 18:33:21,922 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6511 transitions. Word has length 26 [2022-03-01 18:33:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:33:21,922 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 6511 transitions. [2022-03-01 18:33:21,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6511 transitions. [2022-03-01 18:33:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:33:21,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:33:21,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:33:21,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-01 18:33:22,126 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,SelfDestructingSolverStorable40 [2022-03-01 18:33:22,126 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:33:22,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:33:22,126 INFO L85 PathProgramCache]: Analyzing trace with hash 717834456, now seen corresponding path program 34 times [2022-03-01 18:33:22,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:33:22,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248300961] [2022-03-01 18:33:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:33:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:33:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:33:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:22,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:33:22,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248300961] [2022-03-01 18:33:22,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248300961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:33:22,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167370251] [2022-03-01 18:33:22,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:33:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:33:22,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:33:22,788 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) [2022-03-01 18:33:22,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:33:22,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:33:22,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:33:22,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:33:22,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:33:23,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:33:23,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:33:23,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:33:23,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:33:23,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-03-01 18:33:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:23,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:33:24,643 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:33:24,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-01 18:33:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:25,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167370251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:33:25,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:33:25,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-01 18:33:25,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638243916] [2022-03-01 18:33:25,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:33:25,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:33:25,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:33:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:33:25,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:33:25,545 INFO L87 Difference]: Start difference. First operand 1818 states and 6511 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:33:33,832 INFO L93 Difference]: Finished difference Result 3781 states and 12664 transitions. [2022-03-01 18:33:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 18:33:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:33:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:33:33,840 INFO L225 Difference]: With dead ends: 3781 [2022-03-01 18:33:33,841 INFO L226 Difference]: Without dead ends: 3751 [2022-03-01 18:33:33,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1161, Invalid=7029, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 18:33:33,841 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 350 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:33:33,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 301 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 18:33:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-03-01 18:33:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 1891. [2022-03-01 18:33:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 3.5783068783068783) internal successors, (6763), 1890 states have internal predecessors, (6763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 6763 transitions. [2022-03-01 18:33:33,888 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 6763 transitions. Word has length 26 [2022-03-01 18:33:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:33:33,888 INFO L470 AbstractCegarLoop]: Abstraction has 1891 states and 6763 transitions. [2022-03-01 18:33:33,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 6763 transitions. [2022-03-01 18:33:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:33:33,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:33:33,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:33:33,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:33:34,110 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,SelfDestructingSolverStorable41 [2022-03-01 18:33:34,110 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:33:34,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:33:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1522881632, now seen corresponding path program 6 times [2022-03-01 18:33:34,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:33:34,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610473360] [2022-03-01 18:33:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:33:34,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:33:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:33:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:34,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:33:34,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610473360] [2022-03-01 18:33:34,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610473360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:33:34,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756683284] [2022-03-01 18:33:34,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:33:34,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:33:34,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:33:34,870 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) [2022-03-01 18:33:34,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:33:34,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:33:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:33:34,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:33:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:33:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:33:35,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:33:35,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-01 18:33:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:35,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:33:37,282 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:33:37,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 455 treesize of output 333 [2022-03-01 18:33:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:42,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756683284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:33:42,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:33:42,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:33:42,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022164619] [2022-03-01 18:33:42,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:33:42,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:33:42,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:33:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:33:42,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:33:42,678 INFO L87 Difference]: Start difference. First operand 1891 states and 6763 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:33:55,514 INFO L93 Difference]: Finished difference Result 4612 states and 14736 transitions. [2022-03-01 18:33:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:33:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:33:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:33:55,521 INFO L225 Difference]: With dead ends: 4612 [2022-03-01 18:33:55,522 INFO L226 Difference]: Without dead ends: 4567 [2022-03-01 18:33:55,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1233, Invalid=8079, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 18:33:55,523 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 604 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:33:55,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 518 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2490 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 18:33:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2022-03-01 18:33:55,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 1942. [2022-03-01 18:33:55,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.573415765069552) internal successors, (6936), 1941 states have internal predecessors, (6936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6936 transitions. [2022-03-01 18:33:55,565 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6936 transitions. Word has length 26 [2022-03-01 18:33:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:33:55,565 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6936 transitions. [2022-03-01 18:33:55,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:33:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6936 transitions. [2022-03-01 18:33:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:33:55,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:33:55,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:33:55,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-01 18:33:55,769 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,SelfDestructingSolverStorable42 [2022-03-01 18:33:55,769 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:33:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:33:55,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1221704100, now seen corresponding path program 35 times [2022-03-01 18:33:55,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:33:55,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051262143] [2022-03-01 18:33:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:33:55,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:33:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:33:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:56,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:33:56,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051262143] [2022-03-01 18:33:56,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051262143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:33:56,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429203300] [2022-03-01 18:33:56,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:33:56,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:33:56,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:33:56,344 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) [2022-03-01 18:33:56,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:33:56,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:33:56,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:33:56,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:33:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:33:57,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:33:57,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:33:57,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:33:57,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-03-01 18:33:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:57,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:33:58,121 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:33:58,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-01 18:33:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:33:59,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429203300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:33:59,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:33:59,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-01 18:33:59,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225484440] [2022-03-01 18:33:59,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:33:59,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:33:59,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:33:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:33:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:33:59,185 INFO L87 Difference]: Start difference. First operand 1942 states and 6936 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:34:08,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:34:08,551 INFO L93 Difference]: Finished difference Result 4522 states and 14852 transitions. [2022-03-01 18:34:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 18:34:08,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:34:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:34:08,560 INFO L225 Difference]: With dead ends: 4522 [2022-03-01 18:34:08,560 INFO L226 Difference]: Without dead ends: 4460 [2022-03-01 18:34:08,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3288 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1538, Invalid=7582, Unknown=0, NotChecked=0, Total=9120 [2022-03-01 18:34:08,560 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 475 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:34:08,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 490 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 18:34:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-03-01 18:34:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 1990. [2022-03-01 18:34:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 3.572649572649573) internal successors, (7106), 1989 states have internal predecessors, (7106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:34:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 7106 transitions. [2022-03-01 18:34:08,611 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 7106 transitions. Word has length 26 [2022-03-01 18:34:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:34:08,611 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 7106 transitions. [2022-03-01 18:34:08,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:34:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 7106 transitions. [2022-03-01 18:34:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:34:08,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:34:08,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:34:08,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 18:34:08,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:34:08,832 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:34:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:34:08,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2096944352, now seen corresponding path program 36 times [2022-03-01 18:34:08,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:34:08,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808105860] [2022-03-01 18:34:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:34:08,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:34:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:34:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:34:09,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:34:09,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808105860] [2022-03-01 18:34:09,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808105860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:34:09,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203655983] [2022-03-01 18:34:09,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:34:09,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:34:09,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:34:09,353 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) [2022-03-01 18:34:09,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:34:09,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:34:09,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:34:09,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:34:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:34:09,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:34:09,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:34:09,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:34:09,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-03-01 18:34:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:34:10,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:34:11,445 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:34:11,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-01 18:34:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:34:12,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203655983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:34:12,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:34:12,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-01 18:34:12,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904367517] [2022-03-01 18:34:12,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:34:12,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:34:12,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:34:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:34:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:34:12,249 INFO L87 Difference]: Start difference. First operand 1990 states and 7106 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:34:47,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:34:47,546 INFO L93 Difference]: Finished difference Result 5687 states and 18156 transitions. [2022-03-01 18:34:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-03-01 18:34:47,546 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:34:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:34:47,556 INFO L225 Difference]: With dead ends: 5687 [2022-03-01 18:34:47,556 INFO L226 Difference]: Without dead ends: 5639 [2022-03-01 18:34:47,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17823 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=4570, Invalid=38072, Unknown=0, NotChecked=0, Total=42642 [2022-03-01 18:34:47,558 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 745 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 4875 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 4992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:34:47,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 1029 Invalid, 4992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4875 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-01 18:34:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2022-03-01 18:34:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 2081. [2022-03-01 18:34:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.5673076923076925) internal successors, (7420), 2080 states have internal predecessors, (7420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:34:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7420 transitions. [2022-03-01 18:34:47,614 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7420 transitions. Word has length 26 [2022-03-01 18:34:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:34:47,614 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7420 transitions. [2022-03-01 18:34:47,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:34:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7420 transitions. [2022-03-01 18:34:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:34:47,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:34:47,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:34:47,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-01 18:34:47,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:34:47,818 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:34:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:34:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash -964441720, now seen corresponding path program 7 times [2022-03-01 18:34:47,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:34:47,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17547902] [2022-03-01 18:34:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:34:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:34:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:34:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:34:48,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:34:48,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17547902] [2022-03-01 18:34:48,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17547902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:34:48,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533237667] [2022-03-01 18:34:48,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:34:48,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:34:48,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:34:48,230 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) [2022-03-01 18:34:48,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:34:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:34:48,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:34:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:34:48,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:34:48,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:34:48,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:34:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:34:49,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:34:50,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:34:50,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:34:50,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-03-01 18:34:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:34:52,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533237667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:34:52,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:34:52,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:34:52,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125456328] [2022-03-01 18:34:52,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:34:52,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:34:52,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:34:52,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:34:52,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:34:52,527 INFO L87 Difference]: Start difference. First operand 2081 states and 7420 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:34:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:34:59,044 INFO L93 Difference]: Finished difference Result 4614 states and 14746 transitions. [2022-03-01 18:34:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:34:59,044 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:34:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:34:59,052 INFO L225 Difference]: With dead ends: 4614 [2022-03-01 18:34:59,052 INFO L226 Difference]: Without dead ends: 4569 [2022-03-01 18:34:59,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=994, Invalid=4118, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:34:59,053 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 521 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:34:59,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 331 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:34:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2022-03-01 18:34:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 2109. [2022-03-01 18:34:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2108 states have (on average 3.562618595825427) internal successors, (7510), 2108 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:34:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 7510 transitions. [2022-03-01 18:34:59,099 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 7510 transitions. Word has length 26 [2022-03-01 18:34:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:34:59,099 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 7510 transitions. [2022-03-01 18:34:59,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:34:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 7510 transitions. [2022-03-01 18:34:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:34:59,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:34:59,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:34:59,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 18:34:59,303 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,SelfDestructingSolverStorable45 [2022-03-01 18:34:59,303 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:34:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:34:59,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2016520892, now seen corresponding path program 8 times [2022-03-01 18:34:59,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:34:59,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809396842] [2022-03-01 18:34:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:34:59,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:34:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:34:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:34:59,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:34:59,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809396842] [2022-03-01 18:34:59,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809396842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:34:59,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362972750] [2022-03-01 18:34:59,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:34:59,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:34:59,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:34:59,959 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) [2022-03-01 18:34:59,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:34:59,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:34:59,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:34:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:34:59,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:35:00,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:35:00,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-01 18:35:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:01,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:35:03,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:35:03,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:35:03,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:35:03,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 335 treesize of output 253 [2022-03-01 18:35:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:05,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362972750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:35:05,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:35:05,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-01 18:35:05,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864766480] [2022-03-01 18:35:05,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:35:05,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:35:05,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:35:05,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:35:05,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:35:05,056 INFO L87 Difference]: Start difference. First operand 2109 states and 7510 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:35:13,230 INFO L93 Difference]: Finished difference Result 4578 states and 15074 transitions. [2022-03-01 18:35:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:35:13,230 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:35:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:35:13,239 INFO L225 Difference]: With dead ends: 4578 [2022-03-01 18:35:13,239 INFO L226 Difference]: Without dead ends: 4542 [2022-03-01 18:35:13,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1030, Invalid=4822, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 18:35:13,240 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 623 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:35:13,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 324 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1172 Invalid, 0 Unknown, 230 Unchecked, 0.8s Time] [2022-03-01 18:35:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2022-03-01 18:35:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 2177. [2022-03-01 18:35:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 3.5565257352941178) internal successors, (7739), 2176 states have internal predecessors, (7739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 7739 transitions. [2022-03-01 18:35:13,298 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 7739 transitions. Word has length 26 [2022-03-01 18:35:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:35:13,298 INFO L470 AbstractCegarLoop]: Abstraction has 2177 states and 7739 transitions. [2022-03-01 18:35:13,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 7739 transitions. [2022-03-01 18:35:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:35:13,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:35:13,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:35:13,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 18:35:13,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 18:35:13,502 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:35:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:35:13,502 INFO L85 PathProgramCache]: Analyzing trace with hash 784538682, now seen corresponding path program 9 times [2022-03-01 18:35:13,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:35:13,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361617671] [2022-03-01 18:35:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:35:13,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:35:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:35:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:14,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:35:14,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361617671] [2022-03-01 18:35:14,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361617671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:35:14,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732341132] [2022-03-01 18:35:14,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:35:14,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:35:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:35:14,089 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) [2022-03-01 18:35:14,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:35:14,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:35:14,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:35:14,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:35:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:35:14,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:35:14,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:35:14,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:35:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:15,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:35:16,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:35:16,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:35:16,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 455 treesize of output 333 [2022-03-01 18:35:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:21,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732341132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:35:21,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:35:21,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:35:21,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993338915] [2022-03-01 18:35:21,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:35:21,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:35:21,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:35:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:35:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:35:21,252 INFO L87 Difference]: Start difference. First operand 2177 states and 7739 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:35:27,551 INFO L93 Difference]: Finished difference Result 4623 states and 14847 transitions. [2022-03-01 18:35:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:35:27,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:35:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:35:27,559 INFO L225 Difference]: With dead ends: 4623 [2022-03-01 18:35:27,560 INFO L226 Difference]: Without dead ends: 4593 [2022-03-01 18:35:27,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=963, Invalid=4149, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:35:27,560 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 567 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:35:27,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 335 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1348 Invalid, 0 Unknown, 23 Unchecked, 0.9s Time] [2022-03-01 18:35:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2022-03-01 18:35:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2198. [2022-03-01 18:35:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 3.5616750113791533) internal successors, (7825), 2197 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 7825 transitions. [2022-03-01 18:35:27,606 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 7825 transitions. Word has length 26 [2022-03-01 18:35:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:35:27,606 INFO L470 AbstractCegarLoop]: Abstraction has 2198 states and 7825 transitions. [2022-03-01 18:35:27,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 7825 transitions. [2022-03-01 18:35:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:35:27,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:35:27,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:35:27,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 18:35:27,821 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,SelfDestructingSolverStorable47 [2022-03-01 18:35:27,821 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:35:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:35:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1377331970, now seen corresponding path program 10 times [2022-03-01 18:35:27,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:35:27,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921007770] [2022-03-01 18:35:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:35:27,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:35:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:35:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:28,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:35:28,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921007770] [2022-03-01 18:35:28,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921007770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:35:28,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835964168] [2022-03-01 18:35:28,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:35:28,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:35:28,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:35:28,544 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) [2022-03-01 18:35:28,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:35:28,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:35:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:35:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:35:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:35:29,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:35:29,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:35:29,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-01 18:35:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:29,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:35:30,608 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:35:30,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 335 treesize of output 261 [2022-03-01 18:35:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:32,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835964168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:35:32,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:35:32,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:35:32,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143900782] [2022-03-01 18:35:32,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:35:32,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:35:32,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:35:32,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:35:32,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:35:32,833 INFO L87 Difference]: Start difference. First operand 2198 states and 7825 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:35:42,982 INFO L93 Difference]: Finished difference Result 4537 states and 14731 transitions. [2022-03-01 18:35:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:35:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:35:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:35:42,990 INFO L225 Difference]: With dead ends: 4537 [2022-03-01 18:35:42,990 INFO L226 Difference]: Without dead ends: 4500 [2022-03-01 18:35:42,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1007, Invalid=6475, Unknown=0, NotChecked=0, Total=7482 [2022-03-01 18:35:42,991 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 371 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:35:42,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 560 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:35:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4500 states. [2022-03-01 18:35:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4500 to 2189. [2022-03-01 18:35:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.5658135283363803) internal successors, (7802), 2188 states have internal predecessors, (7802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7802 transitions. [2022-03-01 18:35:43,063 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7802 transitions. Word has length 26 [2022-03-01 18:35:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:35:43,063 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 7802 transitions. [2022-03-01 18:35:43,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7802 transitions. [2022-03-01 18:35:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:35:43,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:35:43,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:35:43,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-01 18:35:43,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:35:43,268 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:35:43,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:35:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash -635282148, now seen corresponding path program 11 times [2022-03-01 18:35:43,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:35:43,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871132932] [2022-03-01 18:35:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:35:43,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:35:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:35:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:43,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:35:43,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871132932] [2022-03-01 18:35:43,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871132932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:35:43,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691536388] [2022-03-01 18:35:43,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:35:43,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:35:43,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:35:43,747 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) [2022-03-01 18:35:43,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:35:43,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:35:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:35:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:35:43,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:35:44,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:35:44,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:35:44,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:35:44,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 83 [2022-03-01 18:35:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:44,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:35:45,785 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:35:45,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 269 [2022-03-01 18:35:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:48,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691536388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:35:48,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:35:48,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:35:48,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126722546] [2022-03-01 18:35:48,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:35:48,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:35:48,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:35:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:35:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:35:48,054 INFO L87 Difference]: Start difference. First operand 2189 states and 7802 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:35:57,746 INFO L93 Difference]: Finished difference Result 4320 states and 13876 transitions. [2022-03-01 18:35:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 18:35:57,746 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:35:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:35:57,754 INFO L225 Difference]: With dead ends: 4320 [2022-03-01 18:35:57,754 INFO L226 Difference]: Without dead ends: 4260 [2022-03-01 18:35:57,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1114, Invalid=7076, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 18:35:57,754 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 480 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:35:57,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 461 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 18:35:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-01 18:35:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 2213. [2022-03-01 18:35:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 3.5687160940325495) internal successors, (7894), 2212 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 7894 transitions. [2022-03-01 18:35:57,800 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 7894 transitions. Word has length 26 [2022-03-01 18:35:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:35:57,800 INFO L470 AbstractCegarLoop]: Abstraction has 2213 states and 7894 transitions. [2022-03-01 18:35:57,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:35:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 7894 transitions. [2022-03-01 18:35:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:35:57,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:35:57,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:35:57,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 18:35:58,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 18:35:58,004 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:35:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:35:58,005 INFO L85 PathProgramCache]: Analyzing trace with hash -705646396, now seen corresponding path program 12 times [2022-03-01 18:35:58,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:35:58,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879402903] [2022-03-01 18:35:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:35:58,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:35:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:35:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:58,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:35:58,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879402903] [2022-03-01 18:35:58,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879402903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:35:58,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731152809] [2022-03-01 18:35:58,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:35:58,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:35:58,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:35:58,351 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) [2022-03-01 18:35:58,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:35:58,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:35:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:35:58,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:35:58,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:35:58,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:35:58,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:35:58,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-01 18:35:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:35:59,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:36:00,724 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:36:00,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 269 [2022-03-01 18:36:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:36:05,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731152809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:36:05,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:36:05,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:36:05,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711145932] [2022-03-01 18:36:05,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:36:05,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:36:05,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:36:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:36:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:36:05,967 INFO L87 Difference]: Start difference. First operand 2213 states and 7894 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:36:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:36:16,077 INFO L93 Difference]: Finished difference Result 4637 states and 15221 transitions. [2022-03-01 18:36:16,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 18:36:16,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:36:16,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:36:16,084 INFO L225 Difference]: With dead ends: 4637 [2022-03-01 18:36:16,085 INFO L226 Difference]: Without dead ends: 4607 [2022-03-01 18:36:16,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1053, Invalid=7137, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 18:36:16,085 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 377 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:36:16,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 473 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:36:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2022-03-01 18:36:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 2251. [2022-03-01 18:36:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2250 states have (on average 3.565777777777778) internal successors, (8023), 2250 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:36:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 8023 transitions. [2022-03-01 18:36:16,128 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 8023 transitions. Word has length 26 [2022-03-01 18:36:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:36:16,128 INFO L470 AbstractCegarLoop]: Abstraction has 2251 states and 8023 transitions. [2022-03-01 18:36:16,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:36:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 8023 transitions. [2022-03-01 18:36:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:36:16,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:36:16,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:36:16,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 18:36:16,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:36:16,333 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:36:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:36:16,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1043334006, now seen corresponding path program 13 times [2022-03-01 18:36:16,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:36:16,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740282615] [2022-03-01 18:36:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:36:16,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:36:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:36:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:36:16,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:36:16,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740282615] [2022-03-01 18:36:16,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740282615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:36:16,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775322419] [2022-03-01 18:36:16,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:36:16,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:36:16,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:36:16,863 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) [2022-03-01 18:36:16,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:36:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:36:16,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:36:16,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:36:17,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:36:17,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:36:17,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-01 18:36:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:36:17,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:36:19,108 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:36:19,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 335 treesize of output 261 [2022-03-01 18:36:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:36:23,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775322419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:36:23,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:36:23,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:36:23,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390376461] [2022-03-01 18:36:23,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:36:23,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:36:23,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:36:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:36:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:36:23,198 INFO L87 Difference]: Start difference. First operand 2251 states and 8023 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:36:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:36:31,012 INFO L93 Difference]: Finished difference Result 4402 states and 14468 transitions. [2022-03-01 18:36:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 18:36:31,013 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:36:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:36:31,020 INFO L225 Difference]: With dead ends: 4402 [2022-03-01 18:36:31,020 INFO L226 Difference]: Without dead ends: 4357 [2022-03-01 18:36:31,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=791, Invalid=5215, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 18:36:31,021 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 343 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:36:31,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 386 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1869 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:36:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2022-03-01 18:36:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 2243. [2022-03-01 18:36:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.569134701159679) internal successors, (8002), 2242 states have internal predecessors, (8002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:36:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8002 transitions. [2022-03-01 18:36:31,064 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8002 transitions. Word has length 26 [2022-03-01 18:36:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:36:31,064 INFO L470 AbstractCegarLoop]: Abstraction has 2243 states and 8002 transitions. [2022-03-01 18:36:31,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:36:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8002 transitions. [2022-03-01 18:36:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:36:31,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:36:31,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:36:31,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-01 18:36:31,271 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,SelfDestructingSolverStorable51 [2022-03-01 18:36:31,271 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:36:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:36:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash -913979680, now seen corresponding path program 14 times [2022-03-01 18:36:31,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:36:31,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588111381] [2022-03-01 18:36:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:36:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:36:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:36:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:36:31,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:36:31,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588111381] [2022-03-01 18:36:31,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588111381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:36:31,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994025802] [2022-03-01 18:36:31,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:36:31,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:36:31,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:36:31,508 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) [2022-03-01 18:36:31,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:36:31,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:36:31,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:36:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:36:31,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:36:32,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:36:32,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-01 18:36:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:36:33,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:36:34,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:36:34,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:36:34,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:36:34,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 261 [2022-03-01 18:36:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:36:37,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994025802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:36:37,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:36:37,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 18:36:37,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983272749] [2022-03-01 18:36:37,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:36:37,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:36:37,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:36:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:36:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:36:37,070 INFO L87 Difference]: Start difference. First operand 2243 states and 8002 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:36:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:36:55,851 INFO L93 Difference]: Finished difference Result 5717 states and 18529 transitions. [2022-03-01 18:36:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-01 18:36:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:36:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:36:55,861 INFO L225 Difference]: With dead ends: 5717 [2022-03-01 18:36:55,861 INFO L226 Difference]: Without dead ends: 5643 [2022-03-01 18:36:55,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5160 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=2470, Invalid=11572, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 18:36:55,863 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 710 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:36:55,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 511 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 18:36:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2022-03-01 18:36:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 2345. [2022-03-01 18:36:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 3.564419795221843) internal successors, (8355), 2344 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:36:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 8355 transitions. [2022-03-01 18:36:55,920 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 8355 transitions. Word has length 26 [2022-03-01 18:36:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:36:55,920 INFO L470 AbstractCegarLoop]: Abstraction has 2345 states and 8355 transitions. [2022-03-01 18:36:55,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:36:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 8355 transitions. [2022-03-01 18:36:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:36:55,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:36:55,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:36:55,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 18:36:56,124 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,SelfDestructingSolverStorable52 [2022-03-01 18:36:56,124 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:36:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:36:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1606033876, now seen corresponding path program 15 times [2022-03-01 18:36:56,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:36:56,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131466430] [2022-03-01 18:36:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:36:56,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:36:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:36:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:36:56,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:36:56,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131466430] [2022-03-01 18:36:56,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131466430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:36:56,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510866614] [2022-03-01 18:36:56,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:36:56,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:36:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:36:56,393 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) [2022-03-01 18:36:56,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:36:56,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:36:56,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:36:56,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-01 18:36:56,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:36:56,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:36:56,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-01 18:36:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:36:58,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:36:59,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:36:59,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:36:59,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:36:59,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 261 [2022-03-01 18:37:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:01,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510866614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:37:01,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:37:01,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-01 18:37:01,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990006177] [2022-03-01 18:37:01,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:37:01,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:37:01,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:37:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:37:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:37:01,191 INFO L87 Difference]: Start difference. First operand 2345 states and 8355 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:37:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:37:10,759 INFO L93 Difference]: Finished difference Result 4725 states and 15681 transitions. [2022-03-01 18:37:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:37:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:37:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:37:10,768 INFO L225 Difference]: With dead ends: 4725 [2022-03-01 18:37:10,768 INFO L226 Difference]: Without dead ends: 4675 [2022-03-01 18:37:10,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1074, Invalid=4778, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 18:37:10,768 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 605 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:37:10,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 342 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:37:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2022-03-01 18:37:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 2384. [2022-03-01 18:37:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.556021821233739) internal successors, (8474), 2383 states have internal predecessors, (8474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:37:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 8474 transitions. [2022-03-01 18:37:10,818 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 8474 transitions. Word has length 26 [2022-03-01 18:37:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:37:10,819 INFO L470 AbstractCegarLoop]: Abstraction has 2384 states and 8474 transitions. [2022-03-01 18:37:10,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:37:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 8474 transitions. [2022-03-01 18:37:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:37:10,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:37:10,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:37:10,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-01 18:37:11,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:37:11,023 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:37:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:37:11,023 INFO L85 PathProgramCache]: Analyzing trace with hash 193303520, now seen corresponding path program 16 times [2022-03-01 18:37:11,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:37:11,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145160589] [2022-03-01 18:37:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:37:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:37:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:37:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:11,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:37:11,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145160589] [2022-03-01 18:37:11,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145160589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:37:11,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717872726] [2022-03-01 18:37:11,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:37:11,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:37:11,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:37:11,500 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) [2022-03-01 18:37:11,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:37:11,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:37:11,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:37:11,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:37:11,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:37:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:37:11,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:37:11,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2022-03-01 18:37:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:12,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:37:13,830 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:37:13,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 467 treesize of output 333 [2022-03-01 18:37:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:17,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717872726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:37:17,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:37:17,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-01 18:37:17,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332253003] [2022-03-01 18:37:17,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:37:17,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 18:37:17,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:37:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 18:37:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-03-01 18:37:17,791 INFO L87 Difference]: Start difference. First operand 2384 states and 8474 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 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) [2022-03-01 18:37:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:37:21,332 INFO L93 Difference]: Finished difference Result 3623 states and 12030 transitions. [2022-03-01 18:37:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 18:37:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 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 [2022-03-01 18:37:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:37:21,344 INFO L225 Difference]: With dead ends: 3623 [2022-03-01 18:37:21,344 INFO L226 Difference]: Without dead ends: 3593 [2022-03-01 18:37:21,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:37:21,344 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 198 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:37:21,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 286 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1113 Invalid, 0 Unknown, 150 Unchecked, 0.7s Time] [2022-03-01 18:37:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2022-03-01 18:37:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2421. [2022-03-01 18:37:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 3.5504132231404957) internal successors, (8592), 2420 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:37:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 8592 transitions. [2022-03-01 18:37:21,396 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 8592 transitions. Word has length 26 [2022-03-01 18:37:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:37:21,396 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 8592 transitions. [2022-03-01 18:37:21,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 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) [2022-03-01 18:37:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 8592 transitions. [2022-03-01 18:37:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:37:21,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:37:21,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:37:21,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 18:37:21,611 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,SelfDestructingSolverStorable54 [2022-03-01 18:37:21,611 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:37:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:37:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1764129120, now seen corresponding path program 17 times [2022-03-01 18:37:21,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:37:21,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240328357] [2022-03-01 18:37:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:37:21,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:37:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:37:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:21,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:37:21,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240328357] [2022-03-01 18:37:21,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240328357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:37:21,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382716260] [2022-03-01 18:37:21,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:37:21,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:37:21,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:37:21,997 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) [2022-03-01 18:37:21,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:37:22,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:37:22,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:37:22,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:37:22,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:37:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:37:22,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:37:22,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-03-01 18:37:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:23,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:37:24,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:37:24,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:37:24,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 269 [2022-03-01 18:37:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:29,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382716260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:37:29,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:37:29,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:37:29,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206017920] [2022-03-01 18:37:29,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:37:29,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:37:29,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:37:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:37:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:37:29,744 INFO L87 Difference]: Start difference. First operand 2421 states and 8592 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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) [2022-03-01 18:37:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:37:37,296 INFO L93 Difference]: Finished difference Result 4910 states and 15923 transitions. [2022-03-01 18:37:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:37:37,296 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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 [2022-03-01 18:37:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:37:37,305 INFO L225 Difference]: With dead ends: 4910 [2022-03-01 18:37:37,306 INFO L226 Difference]: Without dead ends: 4815 [2022-03-01 18:37:37,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:37:37,306 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 406 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:37:37,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 365 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1156 Invalid, 0 Unknown, 373 Unchecked, 0.8s Time] [2022-03-01 18:37:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4815 states. [2022-03-01 18:37:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4815 to 2534. [2022-03-01 18:37:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 3.549545992893802) internal successors, (8991), 2533 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:37:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 8991 transitions. [2022-03-01 18:37:37,366 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 8991 transitions. Word has length 26 [2022-03-01 18:37:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:37:37,367 INFO L470 AbstractCegarLoop]: Abstraction has 2534 states and 8991 transitions. [2022-03-01 18:37:37,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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) [2022-03-01 18:37:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 8991 transitions. [2022-03-01 18:37:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:37:37,370 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:37:37,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:37:37,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-01 18:37:37,571 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,SelfDestructingSolverStorable55 [2022-03-01 18:37:37,571 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:37:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:37:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash -340731392, now seen corresponding path program 18 times [2022-03-01 18:37:37,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:37:37,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007308283] [2022-03-01 18:37:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:37:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:37:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:37:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:38,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:37:38,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007308283] [2022-03-01 18:37:38,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007308283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:37:38,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450595923] [2022-03-01 18:37:38,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:37:38,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:37:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:37:38,058 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) [2022-03-01 18:37:38,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:37:38,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:37:38,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:37:38,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:37:38,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:37:38,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:37:38,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:37:38,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:37:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:38,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:37:40,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:37:40,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:37:40,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 261 [2022-03-01 18:37:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:45,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450595923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:37:45,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:37:45,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:37:45,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238467379] [2022-03-01 18:37:45,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:37:45,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:37:45,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:37:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:37:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:37:45,624 INFO L87 Difference]: Start difference. First operand 2534 states and 8991 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:37:50,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:37:50,658 INFO L93 Difference]: Finished difference Result 4511 states and 14825 transitions. [2022-03-01 18:37:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 18:37:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:37:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:37:50,667 INFO L225 Difference]: With dead ends: 4511 [2022-03-01 18:37:50,667 INFO L226 Difference]: Without dead ends: 4469 [2022-03-01 18:37:50,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=738, Invalid=3168, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 18:37:50,667 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 384 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:37:50,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 291 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 702 Invalid, 0 Unknown, 398 Unchecked, 0.5s Time] [2022-03-01 18:37:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-03-01 18:37:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 2586. [2022-03-01 18:37:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 3.546615087040619) internal successors, (9168), 2585 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:37:50,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 9168 transitions. [2022-03-01 18:37:50,726 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 9168 transitions. Word has length 26 [2022-03-01 18:37:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:37:50,726 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 9168 transitions. [2022-03-01 18:37:50,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:37:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 9168 transitions. [2022-03-01 18:37:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:37:50,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:37:50,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:37:50,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 18:37:50,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:37:50,938 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:37:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:37:50,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1958264172, now seen corresponding path program 19 times [2022-03-01 18:37:50,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:37:50,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126705987] [2022-03-01 18:37:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:37:50,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:37:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:37:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:51,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:37:51,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126705987] [2022-03-01 18:37:51,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126705987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:37:51,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276785709] [2022-03-01 18:37:51,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:37:51,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:37:51,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:37:51,303 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) [2022-03-01 18:37:51,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:37:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:37:51,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:37:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:37:51,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:37:51,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:37:51,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:37:51,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 105 [2022-03-01 18:37:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:52,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:37:53,777 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:37:53,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 411 treesize of output 309 [2022-03-01 18:37:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:37:59,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276785709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:37:59,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:37:59,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:37:59,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445264355] [2022-03-01 18:37:59,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:37:59,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:37:59,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:37:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:37:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:37:59,615 INFO L87 Difference]: Start difference. First operand 2586 states and 9168 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:05,232 INFO L93 Difference]: Finished difference Result 4636 states and 15400 transitions. [2022-03-01 18:38:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 18:38:05,233 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:38:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:05,241 INFO L225 Difference]: With dead ends: 4636 [2022-03-01 18:38:05,241 INFO L226 Difference]: Without dead ends: 4598 [2022-03-01 18:38:05,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=739, Invalid=3953, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:38:05,242 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 343 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:05,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 362 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 18:38:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4598 states. [2022-03-01 18:38:05,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4598 to 2592. [2022-03-01 18:38:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 3.5476649942107294) internal successors, (9192), 2591 states have internal predecessors, (9192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:05,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 9192 transitions. [2022-03-01 18:38:05,289 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 9192 transitions. Word has length 26 [2022-03-01 18:38:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:05,289 INFO L470 AbstractCegarLoop]: Abstraction has 2592 states and 9192 transitions. [2022-03-01 18:38:05,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 9192 transitions. [2022-03-01 18:38:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:38:05,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:05,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:05,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 18:38:05,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:05,494 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:38:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:05,494 INFO L85 PathProgramCache]: Analyzing trace with hash 646760220, now seen corresponding path program 20 times [2022-03-01 18:38:05,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:05,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137106221] [2022-03-01 18:38:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:05,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:05,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:05,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137106221] [2022-03-01 18:38:05,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137106221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:05,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196900033] [2022-03-01 18:38:05,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:38:05,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:05,825 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) [2022-03-01 18:38:05,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 18:38:05,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:38:05,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:05,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:38:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:06,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:38:06,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:38:06,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-03-01 18:38:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:06,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:08,188 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:38:08,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 355 treesize of output 269 [2022-03-01 18:38:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:15,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196900033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:15,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:15,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 18:38:15,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303482251] [2022-03-01 18:38:15,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:15,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:38:15,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:15,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:38:15,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:38:15,144 INFO L87 Difference]: Start difference. First operand 2592 states and 9192 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:22,449 INFO L93 Difference]: Finished difference Result 4831 states and 15980 transitions. [2022-03-01 18:38:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 18:38:22,449 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:38:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:22,458 INFO L225 Difference]: With dead ends: 4831 [2022-03-01 18:38:22,458 INFO L226 Difference]: Without dead ends: 4766 [2022-03-01 18:38:22,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=813, Invalid=4737, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:38:22,459 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 355 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:22,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 405 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 18:38:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2022-03-01 18:38:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 2606. [2022-03-01 18:38:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 3.5485604606525913) internal successors, (9244), 2605 states have internal predecessors, (9244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 9244 transitions. [2022-03-01 18:38:22,512 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 9244 transitions. Word has length 26 [2022-03-01 18:38:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:22,513 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 9244 transitions. [2022-03-01 18:38:22,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 9244 transitions. [2022-03-01 18:38:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:38:22,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:22,517 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:22,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 18:38:22,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:22,717 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:38:22,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:22,717 INFO L85 PathProgramCache]: Analyzing trace with hash 902763630, now seen corresponding path program 37 times [2022-03-01 18:38:22,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:22,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096161977] [2022-03-01 18:38:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:22,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:23,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:23,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096161977] [2022-03-01 18:38:23,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096161977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:23,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308387250] [2022-03-01 18:38:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:38:23,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:23,326 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) [2022-03-01 18:38:23,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 18:38:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:23,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:38:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:23,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:38:23,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:38:23,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:38:23,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:38:23,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-03-01 18:38:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:24,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:25,163 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:38:25,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 379 treesize of output 261 [2022-03-01 18:38:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:26,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308387250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:26,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:26,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-01 18:38:26,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778770775] [2022-03-01 18:38:26,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:26,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:38:26,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:38:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:38:26,067 INFO L87 Difference]: Start difference. First operand 2606 states and 9244 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:29,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:29,671 INFO L93 Difference]: Finished difference Result 4288 states and 14482 transitions. [2022-03-01 18:38:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:38:29,671 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:38:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:29,680 INFO L225 Difference]: With dead ends: 4288 [2022-03-01 18:38:29,680 INFO L226 Difference]: Without dead ends: 4258 [2022-03-01 18:38:29,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=620, Invalid=3540, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:38:29,680 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 241 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:29,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 335 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:38:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2022-03-01 18:38:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 2632. [2022-03-01 18:38:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 3.5442797415431393) internal successors, (9325), 2631 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 9325 transitions. [2022-03-01 18:38:29,732 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 9325 transitions. Word has length 26 [2022-03-01 18:38:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:29,732 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 9325 transitions. [2022-03-01 18:38:29,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 9325 transitions. [2022-03-01 18:38:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:38:29,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:29,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:29,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-01 18:38:29,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 18:38:29,936 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:38:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:29,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2020528988, now seen corresponding path program 38 times [2022-03-01 18:38:29,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:29,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665769737] [2022-03-01 18:38:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:29,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:30,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:30,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665769737] [2022-03-01 18:38:30,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665769737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:30,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090275066] [2022-03-01 18:38:30,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:38:30,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:30,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:30,513 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) [2022-03-01 18:38:30,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 18:38:30,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:38:30,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:30,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:38:30,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:31,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:38:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:38:31,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:38:31,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-03-01 18:38:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:31,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:33,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:38:33,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:38:33,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:38:33,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:38:33,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 375 treesize of output 247 [2022-03-01 18:38:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:33,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090275066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:33,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:33,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 18:38:33,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842102820] [2022-03-01 18:38:33,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:33,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:38:33,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:33,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:38:33,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:38:33,955 INFO L87 Difference]: Start difference. First operand 2632 states and 9325 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:38:45,163 INFO L93 Difference]: Finished difference Result 4411 states and 14783 transitions. [2022-03-01 18:38:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:38:45,163 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:38:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:38:45,172 INFO L225 Difference]: With dead ends: 4411 [2022-03-01 18:38:45,172 INFO L226 Difference]: Without dead ends: 4281 [2022-03-01 18:38:45,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1055, Invalid=5107, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 18:38:45,172 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 365 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:38:45,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 297 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:38:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2022-03-01 18:38:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 2686. [2022-03-01 18:38:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 3.527001862197393) internal successors, (9470), 2685 states have internal predecessors, (9470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 9470 transitions. [2022-03-01 18:38:45,224 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 9470 transitions. Word has length 26 [2022-03-01 18:38:45,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:38:45,224 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 9470 transitions. [2022-03-01 18:38:45,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:38:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 9470 transitions. [2022-03-01 18:38:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:38:45,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:38:45,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:38:45,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 18:38:45,428 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,SelfDestructingSolverStorable60 [2022-03-01 18:38:45,428 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:38:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:38:45,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1206563744, now seen corresponding path program 39 times [2022-03-01 18:38:45,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:38:45,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816277787] [2022-03-01 18:38:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:38:45,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:38:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:38:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:45,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:38:45,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816277787] [2022-03-01 18:38:45,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816277787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:38:45,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27291316] [2022-03-01 18:38:45,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:38:45,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:38:45,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:38:45,845 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) [2022-03-01 18:38:45,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 18:38:45,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:38:45,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:38:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:38:45,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:38:46,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:38:46,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:38:46,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 99 [2022-03-01 18:38:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:48,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:38:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:38:53,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:38:53,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 217 [2022-03-01 18:38:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:38:53,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27291316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:38:53,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:38:53,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-03-01 18:38:53,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347896998] [2022-03-01 18:38:53,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:38:53,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:38:53,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:38:53,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:38:53,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:38:53,820 INFO L87 Difference]: Start difference. First operand 2686 states and 9470 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:02,948 INFO L93 Difference]: Finished difference Result 5196 states and 17713 transitions. [2022-03-01 18:39:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:39:02,948 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:39:02,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:02,959 INFO L225 Difference]: With dead ends: 5196 [2022-03-01 18:39:02,959 INFO L226 Difference]: Without dead ends: 5181 [2022-03-01 18:39:02,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 13 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1855, Invalid=9275, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 18:39:02,960 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 366 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 777 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:02,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 426 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1451 Invalid, 0 Unknown, 777 Unchecked, 0.8s Time] [2022-03-01 18:39:02,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5181 states. [2022-03-01 18:39:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5181 to 2698. [2022-03-01 18:39:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2698 states, 2697 states have (on average 3.5231738969225064) internal successors, (9502), 2697 states have internal predecessors, (9502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2698 states to 2698 states and 9502 transitions. [2022-03-01 18:39:03,017 INFO L78 Accepts]: Start accepts. Automaton has 2698 states and 9502 transitions. Word has length 26 [2022-03-01 18:39:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:03,017 INFO L470 AbstractCegarLoop]: Abstraction has 2698 states and 9502 transitions. [2022-03-01 18:39:03,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2698 states and 9502 transitions. [2022-03-01 18:39:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:03,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:03,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:03,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:03,221 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,SelfDestructingSolverStorable61 [2022-03-01 18:39:03,222 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash 267653912, now seen corresponding path program 40 times [2022-03-01 18:39:03,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:03,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910281925] [2022-03-01 18:39:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:03,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:03,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:03,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910281925] [2022-03-01 18:39:03,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910281925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:03,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532700333] [2022-03-01 18:39:03,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:39:03,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:03,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:03,717 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) [2022-03-01 18:39:03,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 18:39:03,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:39:03,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:39:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:04,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:39:04,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:39:04,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:39:04,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:39:04,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-03-01 18:39:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:04,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:05,580 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:39:05,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 245 [2022-03-01 18:39:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:06,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532700333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:06,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:06,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-01 18:39:06,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293193761] [2022-03-01 18:39:06,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:06,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:39:06,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:39:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:39:06,767 INFO L87 Difference]: Start difference. First operand 2698 states and 9502 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:12,474 INFO L93 Difference]: Finished difference Result 4478 states and 15012 transitions. [2022-03-01 18:39:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 18:39:12,474 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:39:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:12,483 INFO L225 Difference]: With dead ends: 4478 [2022-03-01 18:39:12,483 INFO L226 Difference]: Without dead ends: 4448 [2022-03-01 18:39:12,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=926, Invalid=5880, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 18:39:12,484 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 251 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:12,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 539 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2122 Invalid, 0 Unknown, 64 Unchecked, 1.2s Time] [2022-03-01 18:39:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-03-01 18:39:12,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 2732. [2022-03-01 18:39:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 3.5140974002196996) internal successors, (9597), 2731 states have internal predecessors, (9597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 9597 transitions. [2022-03-01 18:39:12,536 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 9597 transitions. Word has length 26 [2022-03-01 18:39:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:12,536 INFO L470 AbstractCegarLoop]: Abstraction has 2732 states and 9597 transitions. [2022-03-01 18:39:12,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:12,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 9597 transitions. [2022-03-01 18:39:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:12,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:12,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:12,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:12,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:12,743 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1794939168, now seen corresponding path program 21 times [2022-03-01 18:39:12,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:12,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664973204] [2022-03-01 18:39:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:12,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:13,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:13,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664973204] [2022-03-01 18:39:13,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664973204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:13,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017997932] [2022-03-01 18:39:13,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:39:13,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:13,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:13,477 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) [2022-03-01 18:39:13,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 18:39:13,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:39:13,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:13,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:39:13,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:14,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:39:14,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:39:14,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:39:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:14,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:16,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:39:16,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 379 treesize of output 313 [2022-03-01 18:39:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:37,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017997932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:37,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:37,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:39:37,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090936615] [2022-03-01 18:39:37,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:37,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:39:37,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:37,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:39:37,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:39:37,501 INFO L87 Difference]: Start difference. First operand 2732 states and 9597 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:43,346 INFO L93 Difference]: Finished difference Result 5708 states and 18244 transitions. [2022-03-01 18:39:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 18:39:43,346 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:39:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:43,358 INFO L225 Difference]: With dead ends: 5708 [2022-03-01 18:39:43,358 INFO L226 Difference]: Without dead ends: 5678 [2022-03-01 18:39:43,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1064, Invalid=4048, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:39:43,359 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 427 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:43,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 327 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 911 Invalid, 0 Unknown, 433 Unchecked, 0.7s Time] [2022-03-01 18:39:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2022-03-01 18:39:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 2778. [2022-03-01 18:39:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 3.5235866042491897) internal successors, (9785), 2777 states have internal predecessors, (9785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 9785 transitions. [2022-03-01 18:39:43,435 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 9785 transitions. Word has length 26 [2022-03-01 18:39:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:43,435 INFO L470 AbstractCegarLoop]: Abstraction has 2778 states and 9785 transitions. [2022-03-01 18:39:43,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 9785 transitions. [2022-03-01 18:39:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:43,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:43,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:43,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 18:39:43,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:43,641 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:43,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1006120406, now seen corresponding path program 22 times [2022-03-01 18:39:43,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:43,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202508049] [2022-03-01 18:39:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:43,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:44,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:44,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202508049] [2022-03-01 18:39:44,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202508049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:44,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091895560] [2022-03-01 18:39:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:39:44,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:44,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:44,289 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) [2022-03-01 18:39:44,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 18:39:44,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:39:44,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:44,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:39:44,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:44,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:39:44,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:39:44,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:39:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:45,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:39:46,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:39:46,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:39:46,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 261 [2022-03-01 18:39:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:50,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091895560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:39:50,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:39:50,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:39:50,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361600870] [2022-03-01 18:39:50,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:39:50,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:39:50,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:39:50,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:39:50,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:39:50,248 INFO L87 Difference]: Start difference. First operand 2778 states and 9785 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:39:57,415 INFO L93 Difference]: Finished difference Result 6015 states and 19169 transitions. [2022-03-01 18:39:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:39:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:39:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:39:57,427 INFO L225 Difference]: With dead ends: 6015 [2022-03-01 18:39:57,427 INFO L226 Difference]: Without dead ends: 5985 [2022-03-01 18:39:57,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1161, Invalid=4095, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 18:39:57,427 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 517 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:39:57,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 412 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1357 Invalid, 0 Unknown, 176 Unchecked, 1.0s Time] [2022-03-01 18:39:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5985 states. [2022-03-01 18:39:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5985 to 2823. [2022-03-01 18:39:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 3.5240963855421685) internal successors, (9945), 2822 states have internal predecessors, (9945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 9945 transitions. [2022-03-01 18:39:57,485 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 9945 transitions. Word has length 26 [2022-03-01 18:39:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:39:57,485 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 9945 transitions. [2022-03-01 18:39:57,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:39:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 9945 transitions. [2022-03-01 18:39:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:39:57,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:39:57,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:39:57,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-01 18:39:57,689 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,SelfDestructingSolverStorable64 [2022-03-01 18:39:57,689 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:39:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:39:57,690 INFO L85 PathProgramCache]: Analyzing trace with hash -205068792, now seen corresponding path program 23 times [2022-03-01 18:39:57,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:39:57,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100103783] [2022-03-01 18:39:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:39:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:39:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:39:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:58,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:39:58,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100103783] [2022-03-01 18:39:58,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100103783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:39:58,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119356821] [2022-03-01 18:39:58,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:39:58,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:39:58,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:39:58,221 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) [2022-03-01 18:39:58,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 18:39:58,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:39:58,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:39:58,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:39:58,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:39:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:39:58,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:39:58,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:39:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:39:59,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:00,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:40:00,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:40:00,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 261 [2022-03-01 18:40:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:05,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119356821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:05,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:05,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 18:40:05,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559814851] [2022-03-01 18:40:05,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:05,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:40:05,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:40:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:40:05,114 INFO L87 Difference]: Start difference. First operand 2823 states and 9945 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:14,402 INFO L93 Difference]: Finished difference Result 6000 states and 19520 transitions. [2022-03-01 18:40:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 18:40:14,407 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:40:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:14,418 INFO L225 Difference]: With dead ends: 6000 [2022-03-01 18:40:14,418 INFO L226 Difference]: Without dead ends: 5963 [2022-03-01 18:40:14,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=831, Invalid=3725, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 18:40:14,419 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 314 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:14,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 425 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 811 Invalid, 0 Unknown, 527 Unchecked, 0.7s Time] [2022-03-01 18:40:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5963 states. [2022-03-01 18:40:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5963 to 2886. [2022-03-01 18:40:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2885 states have (on average 3.5351819757365686) internal successors, (10199), 2885 states have internal predecessors, (10199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 10199 transitions. [2022-03-01 18:40:14,482 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 10199 transitions. Word has length 26 [2022-03-01 18:40:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:14,482 INFO L470 AbstractCegarLoop]: Abstraction has 2886 states and 10199 transitions. [2022-03-01 18:40:14,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 10199 transitions. [2022-03-01 18:40:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:40:14,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:14,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:14,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 18:40:14,686 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,SelfDestructingSolverStorable65 [2022-03-01 18:40:14,686 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1698976514, now seen corresponding path program 24 times [2022-03-01 18:40:14,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:14,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214933880] [2022-03-01 18:40:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:14,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:15,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:15,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214933880] [2022-03-01 18:40:15,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214933880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:15,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971294478] [2022-03-01 18:40:15,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:40:15,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:15,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:15,224 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) [2022-03-01 18:40:15,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 18:40:15,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:40:15,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:15,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:40:15,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:15,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:40:15,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:40:15,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-01 18:40:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:16,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:17,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:40:17,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:40:17,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:40:17,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 253 [2022-03-01 18:40:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:19,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971294478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:19,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:19,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 18:40:19,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308796800] [2022-03-01 18:40:19,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:19,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:40:19,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:19,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:40:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:40:19,332 INFO L87 Difference]: Start difference. First operand 2886 states and 10199 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:33,692 INFO L93 Difference]: Finished difference Result 7128 states and 23544 transitions. [2022-03-01 18:40:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-01 18:40:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:40:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:33,707 INFO L225 Difference]: With dead ends: 7128 [2022-03-01 18:40:33,707 INFO L226 Difference]: Without dead ends: 7083 [2022-03-01 18:40:33,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7413 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=2744, Invalid=15346, Unknown=0, NotChecked=0, Total=18090 [2022-03-01 18:40:33,708 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 611 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1189 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:33,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 788 Invalid, 2977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1683 Invalid, 0 Unknown, 1189 Unchecked, 1.2s Time] [2022-03-01 18:40:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2022-03-01 18:40:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 2926. [2022-03-01 18:40:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 3.545299145299145) internal successors, (10370), 2925 states have internal predecessors, (10370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 10370 transitions. [2022-03-01 18:40:33,788 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 10370 transitions. Word has length 26 [2022-03-01 18:40:33,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:33,788 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 10370 transitions. [2022-03-01 18:40:33,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 10370 transitions. [2022-03-01 18:40:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:40:33,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:33,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:33,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-01 18:40:33,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:33,993 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:33,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1822601572, now seen corresponding path program 25 times [2022-03-01 18:40:33,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:33,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663648833] [2022-03-01 18:40:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:33,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:34,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:34,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663648833] [2022-03-01 18:40:34,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663648833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:34,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549975423] [2022-03-01 18:40:34,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:40:34,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:34,300 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) [2022-03-01 18:40:34,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 18:40:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:34,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:40:34,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:34,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:40:34,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:40:34,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-01 18:40:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:35,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:36,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:40:36,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:40:36,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 265 [2022-03-01 18:40:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:40,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549975423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:40,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:40,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 18:40:40,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085471667] [2022-03-01 18:40:40,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:40,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:40:40,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:40,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:40:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:40:40,877 INFO L87 Difference]: Start difference. First operand 2926 states and 10370 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-01 18:40:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:40:50,868 INFO L93 Difference]: Finished difference Result 6606 states and 21211 transitions. [2022-03-01 18:40:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 18:40:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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 [2022-03-01 18:40:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:40:50,880 INFO L225 Difference]: With dead ends: 6606 [2022-03-01 18:40:50,880 INFO L226 Difference]: Without dead ends: 6553 [2022-03-01 18:40:50,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1566, Invalid=5406, Unknown=0, NotChecked=0, Total=6972 [2022-03-01 18:40:50,881 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 617 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:40:50,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 607 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1842 Invalid, 0 Unknown, 236 Unchecked, 1.3s Time] [2022-03-01 18:40:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2022-03-01 18:40:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 2929. [2022-03-01 18:40:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2929 states, 2928 states have (on average 3.5474726775956285) internal successors, (10387), 2928 states have internal predecessors, (10387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:40:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 10387 transitions. [2022-03-01 18:40:50,947 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 10387 transitions. Word has length 26 [2022-03-01 18:40:50,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:40:50,947 INFO L470 AbstractCegarLoop]: Abstraction has 2929 states and 10387 transitions. [2022-03-01 18:40:50,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 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) [2022-03-01 18:40:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 10387 transitions. [2022-03-01 18:40:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:40:50,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:40:50,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:40:50,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 18:40:51,163 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,SelfDestructingSolverStorable67 [2022-03-01 18:40:51,163 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:40:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:40:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash -629380028, now seen corresponding path program 26 times [2022-03-01 18:40:51,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:40:51,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244288214] [2022-03-01 18:40:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:40:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:40:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:40:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:51,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:40:51,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244288214] [2022-03-01 18:40:51,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244288214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:40:51,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881659300] [2022-03-01 18:40:51,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:40:51,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:40:51,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:40:51,630 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) [2022-03-01 18:40:51,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 18:40:51,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:40:51,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:40:51,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:40:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:40:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:40:52,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:40:52,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 147 treesize of output 115 [2022-03-01 18:40:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:53,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:40:55,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:40:55,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:40:55,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:40:55,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 253 [2022-03-01 18:40:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:40:57,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881659300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:40:57,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:40:57,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 18:40:57,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692354002] [2022-03-01 18:40:57,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:40:57,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:40:57,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:40:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:40:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:40:57,150 INFO L87 Difference]: Start difference. First operand 2929 states and 10387 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:15,154 INFO L93 Difference]: Finished difference Result 6603 states and 21763 transitions. [2022-03-01 18:41:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-01 18:41:15,154 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:41:15,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:15,167 INFO L225 Difference]: With dead ends: 6603 [2022-03-01 18:41:15,167 INFO L226 Difference]: Without dead ends: 6558 [2022-03-01 18:41:15,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5436 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=2378, Invalid=12384, Unknown=0, NotChecked=0, Total=14762 [2022-03-01 18:41:15,168 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 585 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:15,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 699 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1854 Invalid, 0 Unknown, 317 Unchecked, 1.4s Time] [2022-03-01 18:41:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2022-03-01 18:41:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 2942. [2022-03-01 18:41:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2941 states have (on average 3.551513090785447) internal successors, (10445), 2941 states have internal predecessors, (10445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 10445 transitions. [2022-03-01 18:41:15,258 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 10445 transitions. Word has length 26 [2022-03-01 18:41:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:15,258 INFO L470 AbstractCegarLoop]: Abstraction has 2942 states and 10445 transitions. [2022-03-01 18:41:15,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 10445 transitions. [2022-03-01 18:41:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:41:15,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:15,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:15,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:15,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-01 18:41:15,463 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1679960728, now seen corresponding path program 27 times [2022-03-01 18:41:15,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:15,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595064905] [2022-03-01 18:41:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:15,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:15,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:15,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595064905] [2022-03-01 18:41:15,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595064905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:15,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443589123] [2022-03-01 18:41:15,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:41:15,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:15,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:15,845 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) [2022-03-01 18:41:15,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 18:41:15,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:41:15,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:15,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:41:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:16,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:41:16,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-01 18:41:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:17,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:18,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:41:18,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:41:18,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:41:18,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 253 [2022-03-01 18:41:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:21,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443589123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:41:21,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:41:21,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-01 18:41:21,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615753389] [2022-03-01 18:41:21,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:41:21,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:41:21,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:41:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:41:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:41:21,334 INFO L87 Difference]: Start difference. First operand 2942 states and 10445 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:41:38,019 INFO L93 Difference]: Finished difference Result 6795 states and 22452 transitions. [2022-03-01 18:41:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 18:41:38,019 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:41:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:41:38,033 INFO L225 Difference]: With dead ends: 6795 [2022-03-01 18:41:38,034 INFO L226 Difference]: Without dead ends: 6751 [2022-03-01 18:41:38,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1843, Invalid=8459, Unknown=0, NotChecked=0, Total=10302 [2022-03-01 18:41:38,034 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 637 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 2509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:41:38,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 589 Invalid, 2509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1559 Invalid, 0 Unknown, 824 Unchecked, 1.2s Time] [2022-03-01 18:41:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2022-03-01 18:41:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 2937. [2022-03-01 18:41:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2937 states, 2936 states have (on average 3.5497275204359675) internal successors, (10422), 2936 states have internal predecessors, (10422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 10422 transitions. [2022-03-01 18:41:38,123 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 10422 transitions. Word has length 26 [2022-03-01 18:41:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:41:38,123 INFO L470 AbstractCegarLoop]: Abstraction has 2937 states and 10422 transitions. [2022-03-01 18:41:38,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:41:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 10422 transitions. [2022-03-01 18:41:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:41:38,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:41:38,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:41:38,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-01 18:41:38,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-01 18:41:38,343 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:41:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:41:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash 358111584, now seen corresponding path program 28 times [2022-03-01 18:41:38,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:41:38,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384759290] [2022-03-01 18:41:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:41:38,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:41:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:41:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:38,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:41:38,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384759290] [2022-03-01 18:41:38,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384759290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:41:38,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374946377] [2022-03-01 18:41:38,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:41:38,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:41:38,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:41:38,727 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) [2022-03-01 18:41:38,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 18:41:38,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:41:38,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:41:38,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:41:38,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:41:39,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:41:39,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:41:39,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 81 [2022-03-01 18:41:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:41:40,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:41:41,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:41:41,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 323 treesize of output 273 [2022-03-01 18:42:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:00,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374946377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:00,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:00,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:42:00,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781416190] [2022-03-01 18:42:00,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:00,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:42:00,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:00,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:42:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:42:00,858 INFO L87 Difference]: Start difference. First operand 2937 states and 10422 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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) [2022-03-01 18:42:08,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:08,858 INFO L93 Difference]: Finished difference Result 5768 states and 18790 transitions. [2022-03-01 18:42:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 18:42:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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 [2022-03-01 18:42:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:08,869 INFO L225 Difference]: With dead ends: 5768 [2022-03-01 18:42:08,869 INFO L226 Difference]: Without dead ends: 5688 [2022-03-01 18:42:08,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1190, Invalid=5452, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 18:42:08,870 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 427 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:08,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 382 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1282 Invalid, 0 Unknown, 241 Unchecked, 0.9s Time] [2022-03-01 18:42:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2022-03-01 18:42:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 2944. [2022-03-01 18:42:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2944 states, 2943 states have (on average 3.550118926265715) internal successors, (10448), 2943 states have internal predecessors, (10448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 10448 transitions. [2022-03-01 18:42:08,942 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 10448 transitions. Word has length 26 [2022-03-01 18:42:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:08,942 INFO L470 AbstractCegarLoop]: Abstraction has 2944 states and 10448 transitions. [2022-03-01 18:42:08,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 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) [2022-03-01 18:42:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 10448 transitions. [2022-03-01 18:42:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:42:08,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:08,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:08,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-01 18:42:09,146 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,SelfDestructingSolverStorable70 [2022-03-01 18:42:09,147 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash 611956416, now seen corresponding path program 41 times [2022-03-01 18:42:09,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:09,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988572897] [2022-03-01 18:42:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:09,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:09,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988572897] [2022-03-01 18:42:09,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988572897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:09,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776596874] [2022-03-01 18:42:09,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:42:09,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:09,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:09,504 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) [2022-03-01 18:42:09,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 18:42:09,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:42:09,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:09,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:42:09,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:10,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:42:10,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:42:10,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:42:10,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:42:10,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-03-01 18:42:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:10,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:11,331 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:42:11,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 375 treesize of output 253 [2022-03-01 18:42:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:12,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776596874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:12,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:12,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-01 18:42:12,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385691021] [2022-03-01 18:42:12,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:12,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:42:12,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:12,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:42:12,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:42:12,264 INFO L87 Difference]: Start difference. First operand 2944 states and 10448 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:19,043 INFO L93 Difference]: Finished difference Result 4953 states and 16689 transitions. [2022-03-01 18:42:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 18:42:19,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:42:19,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:19,052 INFO L225 Difference]: With dead ends: 4953 [2022-03-01 18:42:19,052 INFO L226 Difference]: Without dead ends: 4859 [2022-03-01 18:42:19,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1157, Invalid=6853, Unknown=0, NotChecked=0, Total=8010 [2022-03-01 18:42:19,053 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 326 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 2077 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:19,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 459 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2077 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 18:42:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2022-03-01 18:42:19,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 2959. [2022-03-01 18:42:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2958 states have (on average 3.555104800540906) internal successors, (10516), 2958 states have internal predecessors, (10516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 10516 transitions. [2022-03-01 18:42:19,105 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 10516 transitions. Word has length 26 [2022-03-01 18:42:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:19,105 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 10516 transitions. [2022-03-01 18:42:19,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 10516 transitions. [2022-03-01 18:42:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:42:19,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:19,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:19,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 18:42:19,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:19,309 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:19,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1457232352, now seen corresponding path program 42 times [2022-03-01 18:42:19,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:19,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895935072] [2022-03-01 18:42:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:19,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:19,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895935072] [2022-03-01 18:42:19,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895935072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:19,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709709578] [2022-03-01 18:42:19,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:42:19,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:19,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:19,740 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) [2022-03-01 18:42:19,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 18:42:19,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:42:19,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:42:19,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:42:19,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:20,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:42:20,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:42:20,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:42:20,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2022-03-01 18:42:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:20,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:21,733 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:42:21,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-01 18:42:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:23,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709709578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:23,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:23,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-01 18:42:23,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897060612] [2022-03-01 18:42:23,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:23,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:42:23,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:23,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:42:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:42:23,246 INFO L87 Difference]: Start difference. First operand 2959 states and 10516 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:42:45,773 INFO L93 Difference]: Finished difference Result 6950 states and 23233 transitions. [2022-03-01 18:42:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-03-01 18:42:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:42:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:42:45,785 INFO L225 Difference]: With dead ends: 6950 [2022-03-01 18:42:45,785 INFO L226 Difference]: Without dead ends: 6903 [2022-03-01 18:42:45,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13336 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=5026, Invalid=26836, Unknown=0, NotChecked=0, Total=31862 [2022-03-01 18:42:45,786 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 623 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 2652 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:42:45,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 658 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2652 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:42:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6903 states. [2022-03-01 18:42:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6903 to 3069. [2022-03-01 18:42:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 3068 states have (on average 3.555410691003911) internal successors, (10908), 3068 states have internal predecessors, (10908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 10908 transitions. [2022-03-01 18:42:45,854 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 10908 transitions. Word has length 26 [2022-03-01 18:42:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:42:45,854 INFO L470 AbstractCegarLoop]: Abstraction has 3069 states and 10908 transitions. [2022-03-01 18:42:45,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:42:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 10908 transitions. [2022-03-01 18:42:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:42:45,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:42:45,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:42:45,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 18:42:46,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:46,059 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:42:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:42:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash 692947996, now seen corresponding path program 43 times [2022-03-01 18:42:46,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:42:46,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778019421] [2022-03-01 18:42:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:42:46,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:42:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:46,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:42:46,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778019421] [2022-03-01 18:42:46,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778019421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:42:46,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891631769] [2022-03-01 18:42:46,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:42:46,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:42:46,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:42:46,447 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) [2022-03-01 18:42:46,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 18:42:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:42:46,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:42:46,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:42:46,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:42:46,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:42:46,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:42:46,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:42:46,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-03-01 18:42:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:47,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:42:48,023 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:42:48,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-03-01 18:42:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:42:48,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891631769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:42:48,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:42:48,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-01 18:42:48,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747052074] [2022-03-01 18:42:48,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:42:48,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:42:48,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:42:48,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:42:48,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:42:48,975 INFO L87 Difference]: Start difference. First operand 3069 states and 10908 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:02,993 INFO L93 Difference]: Finished difference Result 6077 states and 20280 transitions. [2022-03-01 18:43:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-01 18:43:02,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:43:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:03,004 INFO L225 Difference]: With dead ends: 6077 [2022-03-01 18:43:03,005 INFO L226 Difference]: Without dead ends: 6047 [2022-03-01 18:43:03,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6025 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=2566, Invalid=12934, Unknown=0, NotChecked=0, Total=15500 [2022-03-01 18:43:03,006 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 541 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:03,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 625 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2414 Invalid, 0 Unknown, 100 Unchecked, 1.5s Time] [2022-03-01 18:43:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2022-03-01 18:43:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 3077. [2022-03-01 18:43:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 3.5578673602080624) internal successors, (10944), 3076 states have internal predecessors, (10944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 10944 transitions. [2022-03-01 18:43:03,084 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 10944 transitions. Word has length 26 [2022-03-01 18:43:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:03,085 INFO L470 AbstractCegarLoop]: Abstraction has 3077 states and 10944 transitions. [2022-03-01 18:43:03,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 10944 transitions. [2022-03-01 18:43:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:43:03,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:03,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:03,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 18:43:03,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:03,291 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:03,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1196537974, now seen corresponding path program 29 times [2022-03-01 18:43:03,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:03,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240490839] [2022-03-01 18:43:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:03,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:03,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:03,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240490839] [2022-03-01 18:43:03,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240490839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:03,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54050969] [2022-03-01 18:43:03,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:43:03,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:03,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:03,783 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) [2022-03-01 18:43:03,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 18:43:03,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:43:03,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:43:03,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:43:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:43:04,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:43:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:04,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:05,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:43:05,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:43:05,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 459 treesize of output 333 [2022-03-01 18:43:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:14,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54050969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:14,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:14,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:43:14,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412762133] [2022-03-01 18:43:14,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:14,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:43:14,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:14,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:43:14,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:43:14,779 INFO L87 Difference]: Start difference. First operand 3077 states and 10944 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:20,282 INFO L93 Difference]: Finished difference Result 5768 states and 18888 transitions. [2022-03-01 18:43:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 18:43:20,283 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:43:20,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:20,293 INFO L225 Difference]: With dead ends: 5768 [2022-03-01 18:43:20,293 INFO L226 Difference]: Without dead ends: 5726 [2022-03-01 18:43:20,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=845, Invalid=3577, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 18:43:20,294 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 394 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:20,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 332 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 908 Invalid, 0 Unknown, 352 Unchecked, 0.7s Time] [2022-03-01 18:43:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2022-03-01 18:43:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 3062. [2022-03-01 18:43:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3061 states have (on average 3.5583142763802678) internal successors, (10892), 3061 states have internal predecessors, (10892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 10892 transitions. [2022-03-01 18:43:20,352 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 10892 transitions. Word has length 26 [2022-03-01 18:43:20,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:20,352 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 10892 transitions. [2022-03-01 18:43:20,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 10892 transitions. [2022-03-01 18:43:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:43:20,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:20,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:20,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-01 18:43:20,568 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,SelfDestructingSolverStorable74 [2022-03-01 18:43:20,568 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:20,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:20,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2048965000, now seen corresponding path program 30 times [2022-03-01 18:43:20,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:20,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395825722] [2022-03-01 18:43:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:20,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:20,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:20,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395825722] [2022-03-01 18:43:20,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395825722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:20,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917780249] [2022-03-01 18:43:20,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:43:20,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:20,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:20,866 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) [2022-03-01 18:43:20,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 18:43:20,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:43:20,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:43:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:21,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:43:21,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:43:21,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-03-01 18:43:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:24,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:25,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:43:25,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:43:25,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:43:25,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 323 treesize of output 257 [2022-03-01 18:43:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:27,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917780249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:27,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:27,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 18:43:27,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939794162] [2022-03-01 18:43:27,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:27,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 18:43:27,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:27,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 18:43:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:43:27,665 INFO L87 Difference]: Start difference. First operand 3062 states and 10892 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:50,443 INFO L93 Difference]: Finished difference Result 7896 states and 26894 transitions. [2022-03-01 18:43:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-01 18:43:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:43:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:50,458 INFO L225 Difference]: With dead ends: 7896 [2022-03-01 18:43:50,458 INFO L226 Difference]: Without dead ends: 7882 [2022-03-01 18:43:50,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8919 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=2911, Invalid=19739, Unknown=0, NotChecked=0, Total=22650 [2022-03-01 18:43:50,459 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 496 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:50,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 660 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1670 Invalid, 0 Unknown, 329 Unchecked, 1.2s Time] [2022-03-01 18:43:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7882 states. [2022-03-01 18:43:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7882 to 3144. [2022-03-01 18:43:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 3.5625198854597517) internal successors, (11197), 3143 states have internal predecessors, (11197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 11197 transitions. [2022-03-01 18:43:50,532 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 11197 transitions. Word has length 26 [2022-03-01 18:43:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:50,532 INFO L470 AbstractCegarLoop]: Abstraction has 3144 states and 11197 transitions. [2022-03-01 18:43:50,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 11197 transitions. [2022-03-01 18:43:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:43:50,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:50,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:50,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 18:43:50,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:50,737 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:50,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1151910708, now seen corresponding path program 31 times [2022-03-01 18:43:50,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:50,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617626452] [2022-03-01 18:43:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:50,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:51,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:51,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617626452] [2022-03-01 18:43:51,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617626452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:51,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361544078] [2022-03-01 18:43:51,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:43:51,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:51,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:51,043 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) [2022-03-01 18:43:51,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 18:43:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:43:51,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:43:51,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:43:51,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:43:51,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:43:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:51,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:43:52,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:43:52,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:43:52,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-03-01 18:43:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:55,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361544078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:43:55,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:43:55,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:43:55,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906139105] [2022-03-01 18:43:55,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:43:55,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:43:55,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:43:55,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:43:55,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:43:55,579 INFO L87 Difference]: Start difference. First operand 3144 states and 11197 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:43:59,284 INFO L93 Difference]: Finished difference Result 4790 states and 16085 transitions. [2022-03-01 18:43:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:43:59,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:43:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:43:59,293 INFO L225 Difference]: With dead ends: 4790 [2022-03-01 18:43:59,293 INFO L226 Difference]: Without dead ends: 4739 [2022-03-01 18:43:59,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 18:43:59,293 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 298 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:43:59,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 253 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:43:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2022-03-01 18:43:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 3175. [2022-03-01 18:43:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.5598613736609956) internal successors, (11299), 3174 states have internal predecessors, (11299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11299 transitions. [2022-03-01 18:43:59,349 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11299 transitions. Word has length 26 [2022-03-01 18:43:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:43:59,349 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 11299 transitions. [2022-03-01 18:43:59,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:43:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11299 transitions. [2022-03-01 18:43:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:43:59,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:43:59,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:43:59,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-01 18:43:59,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:59,554 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:43:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:43:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash -497021894, now seen corresponding path program 32 times [2022-03-01 18:43:59,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:43:59,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513488439] [2022-03-01 18:43:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:43:59,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:43:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:43:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:43:59,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:43:59,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513488439] [2022-03-01 18:43:59,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513488439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:43:59,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848831708] [2022-03-01 18:43:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:43:59,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:43:59,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:43:59,849 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) [2022-03-01 18:43:59,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 18:43:59,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:43:59,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:43:59,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:43:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:00,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:44:00,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:44:00,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:44:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:00,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:01,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:44:01,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:44:01,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-03-01 18:44:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:05,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848831708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:05,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:05,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:44:05,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446444020] [2022-03-01 18:44:05,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:05,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:44:05,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:44:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:44:05,097 INFO L87 Difference]: Start difference. First operand 3175 states and 11299 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:09,729 INFO L93 Difference]: Finished difference Result 4856 states and 16308 transitions. [2022-03-01 18:44:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:44:09,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:44:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:09,737 INFO L225 Difference]: With dead ends: 4856 [2022-03-01 18:44:09,737 INFO L226 Difference]: Without dead ends: 4814 [2022-03-01 18:44:09,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=631, Invalid=3529, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:44:09,738 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 325 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:09,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 336 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1312 Invalid, 0 Unknown, 190 Unchecked, 0.8s Time] [2022-03-01 18:44:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2022-03-01 18:44:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 3150. [2022-03-01 18:44:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 3.5674817402349954) internal successors, (11234), 3149 states have internal predecessors, (11234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 11234 transitions. [2022-03-01 18:44:09,792 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 11234 transitions. Word has length 26 [2022-03-01 18:44:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:09,792 INFO L470 AbstractCegarLoop]: Abstraction has 3150 states and 11234 transitions. [2022-03-01 18:44:09,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 11234 transitions. [2022-03-01 18:44:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:44:09,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:09,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:09,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:09,997 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,SelfDestructingSolverStorable77 [2022-03-01 18:44:09,997 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1916842724, now seen corresponding path program 33 times [2022-03-01 18:44:09,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:09,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014622143] [2022-03-01 18:44:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:09,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:10,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:10,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014622143] [2022-03-01 18:44:10,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014622143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:10,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453114814] [2022-03-01 18:44:10,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:44:10,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:10,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:10,372 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) [2022-03-01 18:44:10,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 18:44:10,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:44:10,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:10,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:44:10,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:10,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:44:10,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:44:10,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:44:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:11,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:12,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:44:12,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:44:12,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 407 treesize of output 309 [2022-03-01 18:44:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:15,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453114814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:15,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:15,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 18:44:15,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219316449] [2022-03-01 18:44:15,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:15,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 18:44:15,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:15,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 18:44:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:44:15,022 INFO L87 Difference]: Start difference. First operand 3150 states and 11234 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:20,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:20,328 INFO L93 Difference]: Finished difference Result 5175 states and 17368 transitions. [2022-03-01 18:44:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 18:44:20,329 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:44:20,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:20,338 INFO L225 Difference]: With dead ends: 5175 [2022-03-01 18:44:20,338 INFO L226 Difference]: Without dead ends: 5124 [2022-03-01 18:44:20,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:44:20,338 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 384 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:20,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 317 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:44:20,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2022-03-01 18:44:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 3157. [2022-03-01 18:44:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.571292775665399) internal successors, (11271), 3156 states have internal predecessors, (11271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 11271 transitions. [2022-03-01 18:44:20,406 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 11271 transitions. Word has length 26 [2022-03-01 18:44:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:20,406 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 11271 transitions. [2022-03-01 18:44:20,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 11271 transitions. [2022-03-01 18:44:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:44:20,411 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:20,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:20,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:20,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-01 18:44:20,611 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1119118296, now seen corresponding path program 34 times [2022-03-01 18:44:20,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:20,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240195288] [2022-03-01 18:44:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:20,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:20,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:20,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240195288] [2022-03-01 18:44:20,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240195288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:20,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886304172] [2022-03-01 18:44:20,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:44:20,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:20,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:20,924 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) [2022-03-01 18:44:20,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 18:44:20,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:44:20,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:44:20,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:21,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:44:21,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:44:21,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-03-01 18:44:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:22,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:22,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:44:22,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:44:22,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-03-01 18:44:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:28,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886304172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:28,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:28,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 18:44:28,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255613700] [2022-03-01 18:44:28,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:28,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 18:44:28,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:28,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 18:44:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:44:28,400 INFO L87 Difference]: Start difference. First operand 3157 states and 11271 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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) [2022-03-01 18:44:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:44:33,800 INFO L93 Difference]: Finished difference Result 5618 states and 18849 transitions. [2022-03-01 18:44:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 18:44:33,801 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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 [2022-03-01 18:44:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:44:33,810 INFO L225 Difference]: With dead ends: 5618 [2022-03-01 18:44:33,810 INFO L226 Difference]: Without dead ends: 5567 [2022-03-01 18:44:33,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=799, Invalid=3233, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:44:33,811 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 305 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:33,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 379 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 18:44:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2022-03-01 18:44:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 3162. [2022-03-01 18:44:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3162 states, 3161 states have (on average 3.574185384372034) internal successors, (11298), 3161 states have internal predecessors, (11298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:44:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 11298 transitions. [2022-03-01 18:44:33,873 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 11298 transitions. Word has length 26 [2022-03-01 18:44:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:44:33,873 INFO L470 AbstractCegarLoop]: Abstraction has 3162 states and 11298 transitions. [2022-03-01 18:44:33,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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) [2022-03-01 18:44:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 11298 transitions. [2022-03-01 18:44:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 18:44:33,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:44:33,878 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:44:33,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:34,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:34,083 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:44:34,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:44:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash 622396936, now seen corresponding path program 35 times [2022-03-01 18:44:34,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:44:34,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185341355] [2022-03-01 18:44:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:44:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:44:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:44:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:34,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:44:34,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185341355] [2022-03-01 18:44:34,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185341355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:44:34,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029594443] [2022-03-01 18:44:34,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:44:34,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:34,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:44:34,359 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) [2022-03-01 18:44:34,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 18:44:34,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:44:34,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:44:34,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:44:34,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:44:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:44:34,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:44:34,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-03-01 18:44:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:35,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:44:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:44:36,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:44:36,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 265 [2022-03-01 18:44:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:44:39,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029594443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:44:39,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:44:39,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 18:44:39,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656395878] [2022-03-01 18:44:39,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:44:39,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 18:44:39,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:44:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 18:44:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-03-01 18:44:39,161 INFO L87 Difference]: Start difference. First operand 3162 states and 11298 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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) Received shutdown request... [2022-03-01 18:44:47,062 WARN L244 SmtUtils]: Removed 8 from assertion stack [2022-03-01 18:44:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 18:44:47,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2598 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1026, Invalid=5946, Unknown=0, NotChecked=0, Total=6972 [2022-03-01 18:44:47,062 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 280 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:44:47,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 218 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1150 Invalid, 0 Unknown, 145 Unchecked, 0.8s Time] [2022-03-01 18:44:47,063 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-01 18:44:47,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 18:44:47,090 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 [2022-03-01 18:44:47,090 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:44:47,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:44:47,264 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (3162states) and FLOYD_HOARE automaton (currently 61 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 122 for 189ms.. [2022-03-01 18:44:47,265 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-01 18:44:47,265 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-01 18:44:47,265 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-01 18:44:47,267 INFO L732 BasicCegarLoop]: Path program histogram: [43, 35, 1, 1, 1] [2022-03-01 18:44:47,269 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:44:47,269 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:44:47,270 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:44:47 BasicIcfg [2022-03-01 18:44:47,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:44:47,270 INFO L158 Benchmark]: Toolchain (without parser) took 753309.77ms. Allocated memory was 175.1MB in the beginning and 550.5MB in the end (delta: 375.4MB). Free memory was 132.2MB in the beginning and 362.6MB in the end (delta: -230.4MB). Peak memory consumption was 145.7MB. Max. memory is 8.0GB. [2022-03-01 18:44:47,270 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 175.1MB. Free memory is still 133.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:44:47,270 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.98ms. Allocated memory is still 175.1MB. Free memory was 132.1MB in the beginning and 130.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:44:47,270 INFO L158 Benchmark]: Boogie Preprocessor took 11.14ms. Allocated memory is still 175.1MB. Free memory was 130.6MB in the beginning and 129.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:44:47,270 INFO L158 Benchmark]: RCFGBuilder took 203.73ms. Allocated memory is still 175.1MB. Free memory was 129.6MB in the beginning and 120.1MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:44:47,270 INFO L158 Benchmark]: TraceAbstraction took 753067.89ms. Allocated memory was 175.1MB in the beginning and 550.5MB in the end (delta: 375.4MB). Free memory was 119.6MB in the beginning and 362.6MB in the end (delta: -243.0MB). Peak memory consumption was 133.1MB. Max. memory is 8.0GB. [2022-03-01 18:44:47,271 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 0.11ms. Allocated memory is still 175.1MB. Free memory is still 133.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.98ms. Allocated memory is still 175.1MB. Free memory was 132.1MB in the beginning and 130.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.14ms. Allocated memory is still 175.1MB. Free memory was 130.6MB in the beginning and 129.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 203.73ms. Allocated memory is still 175.1MB. Free memory was 129.6MB in the beginning and 120.1MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 753067.89ms. Allocated memory was 175.1MB in the beginning and 550.5MB in the end (delta: 375.4MB). Free memory was 119.6MB in the beginning and 362.6MB in the end (delta: -243.0MB). Peak memory consumption was 133.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3162states) and FLOYD_HOARE automaton (currently 61 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 122 for 189ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3162states) and FLOYD_HOARE automaton (currently 61 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 122 for 189ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3162states) and FLOYD_HOARE automaton (currently 61 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 122 for 189ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3162states) and FLOYD_HOARE automaton (currently 61 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 122 for 189ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 753.0s, OverallIterations: 81, TraceHistogramMax: 2, PathProgramHistogramMax: 43, EmptinessCheckTime: 0.2s, AutomataDifference: 434.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28771 SdHoareTripleChecker+Valid, 55.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28771 mSDsluCounter, 24506 SdHoareTripleChecker+Invalid, 47.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 7204 IncrementalHoareTripleChecker+Unchecked, 43116 mSDsCounter, 5698 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 87940 IncrementalHoareTripleChecker+Invalid, 100842 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5698 mSolverCounterUnsat, 2240 mSDtfsCounter, 87940 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8244 GetRequests, 2878 SyntacticMatches, 203 SemanticMatches, 5162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159631 ImplicationChecksByTransitivity, 410.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3175occurred in iteration=77, InterpolantAutomatonStates: 4222, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 80 MinimizatonAttempts, 155384 StatesRemovedByMinimization, 80 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 295.6s InterpolantComputationTime, 3946 NumberOfCodeBlocks, 3943 NumberOfCodeBlocksAsserted, 247 NumberOfCheckSat, 5653 ConstructedInterpolants, 75 QuantifiedInterpolants, 191023 SizeOfPredicates, 923 NumberOfNonLiveVariables, 5083 ConjunctsInSsa, 1477 ConjunctsInUnsatCore, 237 InterpolantComputations, 3 PerfectInterpolantSequences, 174/1286 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